Reland "remove toString"

This reverts commit 32a4910e57b1fdd3c8671de1ee85e05ca21d079f.

Reason for revert: SkMatrix::toString use has been removed from flutter and has been picked up in fuchsia

Original change's description:
> Revert "remove toString"
> 
> This reverts commit 5191880cbf3ee4d122b0d11b4945fbab0784fda7.
> 
> Reason for revert: broke flutter
> 
> Original change's description:
> > remove toString
> > 
> > toString may have been used by obsolete debugger only
> > find out if that is so
> > 
> > R=​brianosman@google.com,bsalomon@google.com
> > 
> > Docs-Preview: https://skia.org/?cl=119894
> > Bug:830651
> > Change-Id: I737f19b7d3fbc869bea2f443fa3b5ed7c1393ffd
> > Reviewed-on: https://skia-review.googlesource.com/119894
> > Commit-Queue: Cary Clark <caryclark@google.com>
> > Reviewed-by: Brian Salomon <bsalomon@google.com>
> 
> TBR=bsalomon@google.com,brianosman@google.com,caryclark@google.com,caryclark@skia.org
> 
> Change-Id: I9f81de6c3615ee0608bcea9081b77239b4b8816c
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Bug: 830651
> Reviewed-on: https://skia-review.googlesource.com/129340
> Reviewed-by: Cary Clark <caryclark@google.com>
> Commit-Queue: Cary Clark <caryclark@google.com>

TBR=bsalomon@google.com,brianosman@google.com,caryclark@google.com,caryclark@skia.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 830651
Change-Id: Ida8725b6051132d8c46faf99358a8fcc1bcabf34
Reviewed-on: https://skia-review.googlesource.com/129623
Reviewed-by: Cary Clark <caryclark@skia.org>
Reviewed-by: Cary Clark <caryclark@google.com>
Commit-Queue: Cary Clark <caryclark@google.com>

87 files changed, 2 insertions, 1090 deletions

diff --git a/src/core/SkBitmap.cpp b/src/core/SkBitmap.cpp
index 579573367f..91510007cf 100644
--- a/src/core/SkBitmap.cpp
+++ b/src/core/SkBitmap.cpp
@@ -633,33 +633,6 @@ void SkBitmap::validate() const {
 }
 #endif
 
-#include "SkString.h"
-void SkBitmap::toString(SkString* str) const {
-
-    static const char* gColorTypeNames[kLastEnum_SkColorType + 1] = {
-        "UNKNOWN", "A8", "565", "4444", "RGBA", "BGRA", "INDEX8",
-    };
-
-    str->appendf("bitmap: ((%d, %d) %s", this->width(), this->height(),
-                 gColorTypeNames[this->colorType()]);
-
-    str->append(" (");
-    if (this->isOpaque()) {
-        str->append("opaque");
-    } else {
-        str->append("transparent");
-    }
-    if (this->isImmutable()) {
-        str->append(", immutable");
-    } else {
-        str->append(", not-immutable");
-    }
-    str->append(")");
-
-    str->appendf(" pixelref:%p", this->pixelRef());
-    str->append(")");
-}
-
 ///////////////////////////////////////////////////////////////////////////////
 
 bool SkBitmap::peekPixels(SkPixmap* pmap) const {
diff --git a/src/core/SkBlitter.cpp b/src/core/SkBlitter.cpp
index 5cf8147019..44cc8f1734 100644
--- a/src/core/SkBlitter.cpp
+++ b/src/core/SkBlitter.cpp
@@ -861,19 +861,6 @@ public:
         typedef Context INHERITED;
     };
 
-    void toString(SkString* str) const override {
-        str->append("Sk3DShader: (");
-
-        if (fProxy) {
-            str->append("Proxy: ");
-            as_SB(fProxy)->toString(str);
-        }
-
-        this->INHERITED::toString(str);
-
-        str->append(")");
-    }
-
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(Sk3DShader)
 
 protected:
diff --git a/src/core/SkBlurImageFilter.cpp b/src/core/SkBlurImageFilter.cpp
index a53d061b37..818644818c 100644
--- a/src/core/SkBlurImageFilter.cpp
+++ b/src/core/SkBlurImageFilter.cpp
@@ -41,7 +41,6 @@ public:
 
     SkRect computeFastBounds(const SkRect&) const override;
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkBlurImageFilterImpl)
 
 protected:
@@ -697,15 +696,3 @@ SkIRect SkBlurImageFilterImpl::onFilterNodeBounds(const SkIRect& src, const SkMa
     SkVector sigma = map_sigma(fSigma, ctm);
     return src.makeOutset(SkScalarCeilToInt(sigma.x() * 3), SkScalarCeilToInt(sigma.y() * 3));
 }
-
-void SkBlurImageFilterImpl::toString(SkString* str) const {
-    str->appendf("SkBlurImageFilterImpl: (");
-    str->appendf("sigma: (%f, %f) tileMode: %d input (", fSigma.fWidth, fSigma.fHeight,
-                 static_cast<int>(fTileMode));
-
-    if (this->getInput(0)) {
-        this->getInput(0)->toString(str);
-    }
-
-    str->append("))");
-}
diff --git a/src/core/SkBlurMF.cpp b/src/core/SkBlurMF.cpp
index d716c33f68..23cca83655 100644
--- a/src/core/SkBlurMF.cpp
+++ b/src/core/SkBlurMF.cpp
@@ -77,7 +77,6 @@ public:
     void computeFastBounds(const SkRect&, SkRect*) const override;
     bool asABlur(BlurRec*) const override;
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkBlurMaskFilterImpl)
 
 protected:
@@ -992,23 +991,6 @@ sk_sp<GrTextureProxy> SkBlurMaskFilterImpl::filterMaskGPU(GrContext* context,
 
 #endif // SK_SUPPORT_GPU
 
-
-void SkBlurMaskFilterImpl::toString(SkString* str) const {
-    str->append("SkBlurMaskFilterImpl: (");
-
-    str->append("sigma: ");
-    str->appendScalar(fSigma);
-    str->append(" ");
-
-    static const char* gStyleName[kLastEnum_SkBlurStyle + 1] = {
-        "normal", "solid", "outer", "inner"
-    };
-
-    str->appendf("style: %s ", gStyleName[fBlurStyle]);
-    str->appendf("respectCTM: %s ", fRespectCTM ? "true" : "false");
-    str->append(")");
-}
-
 void sk_register_blur_maskfilter_createproc() {
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkBlurMaskFilterImpl)
 }
diff --git a/src/core/SkColorFilter.cpp b/src/core/SkColorFilter.cpp
index 5362c1aca7..41ebb42669 100644
--- a/src/core/SkColorFilter.cpp
+++ b/src/core/SkColorFilter.cpp
@@ -98,15 +98,6 @@ public:
         return fOuter->getFlags() & fInner->getFlags();
     }
 
-    void toString(SkString* str) const override {
-        SkString outerS, innerS;
-        fOuter->toString(&outerS);
-        fInner->toString(&innerS);
-        // These strings can be long.  SkString::appendf has limitations.
-        str->append(SkStringPrintf("SkComposeColorFilter: outer(%s) inner(%s)", outerS.c_str(),
-                                   innerS.c_str()));
-    }
-
     void onAppendStages(SkRasterPipeline* p, SkColorSpace* dst, SkArenaAlloc* scratch,
                         bool shaderIsOpaque) const override {
         bool innerIsOpaque = shaderIsOpaque;
@@ -225,8 +216,6 @@ public:
     }
 #endif
 
-    void toString(SkString* str) const override;
-
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkSRGBGammaColorFilter)
 
     void onAppendStages(SkRasterPipeline* p, SkColorSpace*, SkArenaAlloc* alloc,
@@ -267,10 +256,6 @@ sk_sp<SkFlattenable> SkSRGBGammaColorFilter::CreateProc(SkReadBuffer& buffer) {
     return sk_sp<SkFlattenable>(new SkSRGBGammaColorFilter(static_cast<Direction>(dir)));
 }
 
-void SkSRGBGammaColorFilter::toString(SkString* str) const {
-    str->append("srgbgamma");
-}
-
 template <SkSRGBGammaColorFilter::Direction dir>
 sk_sp<SkColorFilter> MakeSRGBGammaCF() {
     static SkColorFilter* gSingleton = new SkSRGBGammaColorFilter(dir);
diff --git a/src/core/SkColorMatrixFilterRowMajor255.cpp b/src/core/SkColorMatrixFilterRowMajor255.cpp
index 09b0e76136..98fa95ae16 100644
--- a/src/core/SkColorMatrixFilterRowMajor255.cpp
+++ b/src/core/SkColorMatrixFilterRowMajor255.cpp
@@ -299,19 +299,6 @@ std::unique_ptr<GrFragmentProcessor> SkColorMatrixFilterRowMajor255::asFragmentP
 
 #endif
 
-void SkColorMatrixFilterRowMajor255::toString(SkString* str) const {
-    str->append("SkColorMatrixFilterRowMajor255: ");
-
-    str->append("matrix: (");
-    for (int i = 0; i < 20; ++i) {
-        str->appendScalar(fMatrix[i]);
-        if (i < 19) {
-            str->append(", ");
-        }
-    }
-    str->append(")");
-}
-
 ///////////////////////////////////////////////////////////////////////////////
 
 sk_sp<SkColorFilter> SkColorFilter::MakeMatrixFilterRowMajor255(const SkScalar array[20]) {
diff --git a/src/core/SkColorMatrixFilterRowMajor255.h b/src/core/SkColorMatrixFilterRowMajor255.h
index 8c774504e9..968c4c847d 100644
--- a/src/core/SkColorMatrixFilterRowMajor255.h
+++ b/src/core/SkColorMatrixFilterRowMajor255.h
@@ -28,8 +28,6 @@ public:
             GrContext*, const GrColorSpaceInfo&) const override;
 #endif
 
-    void toString(SkString* str) const override;
-
     Factory getFactory() const override { return CreateProc; }
 
 protected:
diff --git a/src/core/SkDraw_vertices.cpp b/src/core/SkDraw_vertices.cpp
index 000be07cea..de6eaea5b6 100644
--- a/src/core/SkDraw_vertices.cpp
+++ b/src/core/SkDraw_vertices.cpp
@@ -77,8 +77,6 @@ public:
 
     bool isOpaque() const override { return fIsOpaque; }
 
-    void toString(SkString* str) const override;
-
     // For serialization.  This will never be called.
     Factory getFactory() const override { SK_ABORT("not reached"); return nullptr; }
 
@@ -99,14 +97,6 @@ private:
     typedef SkShaderBase INHERITED;
 };
 
-void SkTriColorShader::toString(SkString* str) const {
-    str->append("SkTriColorShader: (");
-
-    this->INHERITED::toString(str);
-
-    str->append(")");
-}
-
 static bool SK_WARN_UNUSED_RESULT
 update_tricolor_matrix(const SkMatrix& ctmInv, const SkPoint pts[], const SkPM4f colors[],
                        int index0, int index1, int index2, Matrix43* result) {
diff --git a/src/core/SkImageFilter.cpp b/src/core/SkImageFilter.cpp
index aabfef09bb..77095fb5b9 100644
--- a/src/core/SkImageFilter.cpp
+++ b/src/core/SkImageFilter.cpp
@@ -28,35 +28,6 @@
 #include "SkGr.h"
 #endif
 
-void SkImageFilter::CropRect::toString(SkString* str) const {
-    if (!fFlags) {
-        return;
-    }
-
-    str->appendf("cropRect (");
-    if (fFlags & CropRect::kHasLeft_CropEdge) {
-        str->appendf("%.2f, ", fRect.fLeft);
-    } else {
-        str->appendf("X, ");
-    }
-    if (fFlags & CropRect::kHasTop_CropEdge) {
-        str->appendf("%.2f, ", fRect.fTop);
-    } else {
-        str->appendf("X, ");
-    }
-    if (fFlags & CropRect::kHasWidth_CropEdge) {
-        str->appendf("%.2f, ", fRect.width());
-    } else {
-        str->appendf("X, ");
-    }
-    if (fFlags & CropRect::kHasHeight_CropEdge) {
-        str->appendf("%.2f", fRect.height());
-    } else {
-        str->appendf("X");
-    }
-    str->appendf(") ");
-}
-
 void SkImageFilter::CropRect::applyTo(const SkIRect& imageBounds,
                                       const SkMatrix& ctm,
                                       bool embiggen,
diff --git a/src/core/SkLocalMatrixImageFilter.cpp b/src/core/SkLocalMatrixImageFilter.cpp
index 07db7aff77..fb484c9448 100644
--- a/src/core/SkLocalMatrixImageFilter.cpp
+++ b/src/core/SkLocalMatrixImageFilter.cpp
@@ -67,8 +67,3 @@ const {
     }
     return this->refMe();
 }
-
-void SkLocalMatrixImageFilter::toString(SkString* str) const {
-    str->append("SkLocalMatrixImageFilter: (");
-    str->append(")");
-}
diff --git a/src/core/SkLocalMatrixImageFilter.h b/src/core/SkLocalMatrixImageFilter.h
index f4ca73c185..8a3ee2cb03 100644
--- a/src/core/SkLocalMatrixImageFilter.h
+++ b/src/core/SkLocalMatrixImageFilter.h
@@ -19,8 +19,6 @@ class SkLocalMatrixImageFilter : public SkImageFilter {
 public:
     static sk_sp<SkImageFilter> Make(const SkMatrix& localM, sk_sp<SkImageFilter> input);
 
-    void toString(SkString* str) const override;
-
     Factory getFactory() const override { return CreateProc; }
 
 protected:
diff --git a/src/core/SkMaskFilter.cpp b/src/core/SkMaskFilter.cpp
index 52cdc3cc9b..3ff4f93405 100644
--- a/src/core/SkMaskFilter.cpp
+++ b/src/core/SkMaskFilter.cpp
@@ -405,7 +405,6 @@ public:
     }
 
     SkMask::Format getFormat() const override { return SkMask::kA8_Format; }
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkComposeMF)
 
 protected:
@@ -470,10 +469,6 @@ sk_sp<SkFlattenable> SkComposeMF::CreateProc(SkReadBuffer& buffer) {
     return SkMaskFilter::MakeCompose(std::move(outer), std::move(inner));
 }
 
-void SkComposeMF::toString(SkString* str) const {
-    str->set("SkComposeMF:");
-}
-
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 class SkCombineMF : public SkMaskFilterBase {
@@ -498,7 +493,6 @@ public:
 
     SkMask::Format getFormat() const override { return SkMask::kA8_Format; }
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkCombineMF)
 
 protected:
@@ -625,10 +619,6 @@ sk_sp<SkFlattenable> SkCombineMF::CreateProc(SkReadBuffer& buffer) {
     return SkMaskFilter::MakeCombine(std::move(dst), std::move(src), mode);
 }
 
-void SkCombineMF::toString(SkString* str) const {
-    str->set("SkCombineMF:");
-}
-
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 class SkMatrixMF : public SkMaskFilterBase {
@@ -652,10 +642,6 @@ public:
 
     SkMask::Format getFormat() const override { return as_MFB(fFilter)->getFormat(); }
 
-    void toString(SkString* str) const override {
-        str->set("SkMatrixMF:");
-    }
-
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkLocalMatrixMF)
 
 protected:
diff --git a/src/core/SkMatrix.cpp b/src/core/SkMatrix.cpp
index 990f5b4652..d3bdb38b78 100644
--- a/src/core/SkMatrix.cpp
+++ b/src/core/SkMatrix.cpp
@@ -1659,14 +1659,10 @@ size_t SkMatrix::readFromMemory(const void* buffer, size_t length) {
 
 void SkMatrix::dump() const {
     SkString str;
-    this->toString(&str);
-    SkDebugf("%s\n", str.c_str());
-}
-
-void SkMatrix::toString(SkString* str) const {
-    str->appendf("[%8.4f %8.4f %8.4f][%8.4f %8.4f %8.4f][%8.4f %8.4f %8.4f]",
+    str.appendf("[%8.4f %8.4f %8.4f][%8.4f %8.4f %8.4f][%8.4f %8.4f %8.4f]",
              fMat[0], fMat[1], fMat[2], fMat[3], fMat[4], fMat[5],
              fMat[6], fMat[7], fMat[8]);
+    SkDebugf("%s\n", str.c_str());
 }
 
 ///////////////////////////////////////////////////////////////////////////////
diff --git a/src/core/SkMatrixImageFilter.cpp b/src/core/SkMatrixImageFilter.cpp
index 47b0d4245e..e56abbc96a 100644
--- a/src/core/SkMatrixImageFilter.cpp
+++ b/src/core/SkMatrixImageFilter.cpp
@@ -143,25 +143,3 @@ SkIRect SkMatrixImageFilter::onFilterNodeBounds(const SkIRect& src, const SkMatr
 
     return result;
 }
-
-void SkMatrixImageFilter::toString(SkString* str) const {
-    str->appendf("SkMatrixImageFilter: (");
-
-    str->appendf("transform: (%f %f %f %f %f %f %f %f %f)",
-                 fTransform[SkMatrix::kMScaleX],
-                 fTransform[SkMatrix::kMSkewX],
-                 fTransform[SkMatrix::kMTransX],
-                 fTransform[SkMatrix::kMSkewY],
-                 fTransform[SkMatrix::kMScaleY],
-                 fTransform[SkMatrix::kMTransY],
-                 fTransform[SkMatrix::kMPersp0],
-                 fTransform[SkMatrix::kMPersp1],
-                 fTransform[SkMatrix::kMPersp2]);
-
-    str->append("<dt>FilterLevel:</dt><dd>");
-    static const char* gFilterLevelStrings[] = { "None", "Low", "Medium", "High" };
-    str->append(gFilterLevelStrings[fFilterQuality]);
-    str->append("</dd>");
-
-    str->appendf(")");
-}
diff --git a/src/core/SkMatrixImageFilter.h b/src/core/SkMatrixImageFilter.h
index 32d4adc448..a100aecddb 100644
--- a/src/core/SkMatrixImageFilter.h
+++ b/src/core/SkMatrixImageFilter.h
@@ -32,8 +32,6 @@ public:
 
     SkRect computeFastBounds(const SkRect&) const override;
 
-    void toString(SkString* str) const override;
-
     Factory getFactory() const override { return CreateProc; }
 
 protected:
diff --git a/src/core/SkModeColorFilter.cpp b/src/core/SkModeColorFilter.cpp
index b3d6aa2e8d..7e1e26e91a 100644
--- a/src/core/SkModeColorFilter.cpp
+++ b/src/core/SkModeColorFilter.cpp
@@ -31,13 +31,6 @@ SkModeColorFilter::SkModeColorFilter(SkColor color, SkBlendMode mode) {
     fPMColor = SkPreMultiplyColor(fColor);
 }
 
-void SkModeColorFilter::toString(SkString* str) const {
-    str->append("SkModeColorFilter: color: 0x");
-    str->appendHex(fColor);
-    str->append(" mode: ");
-    str->append(SkBlendMode_Name(fMode));
-}
-
 bool SkModeColorFilter::asColorMode(SkColor* color, SkBlendMode* mode) const {
     if (color) {
         *color = fColor;
diff --git a/src/core/SkModeColorFilter.h b/src/core/SkModeColorFilter.h
index d2018e5cb9..c78d7897bf 100644
--- a/src/core/SkModeColorFilter.h
+++ b/src/core/SkModeColorFilter.h
@@ -23,8 +23,6 @@ public:
     bool asColorMode(SkColor*, SkBlendMode*) const override;
     uint32_t getFlags() const override;
 
-    void toString(SkString* str) const override;
-
     Factory getFactory() const override { return CreateProc; }
 
 #if SK_SUPPORT_GPU
diff --git a/src/core/SkPaint.cpp b/src/core/SkPaint.cpp
index 82dec0ea8c..c76b98121e 100644
--- a/src/core/SkPaint.cpp
+++ b/src/core/SkPaint.cpp
@@ -1384,155 +1384,6 @@ const SkRect& SkPaint::doComputeFastBounds(const SkRect& origSrc,
     return *storage;
 }
 
-void SkPaint::toString(SkString* str) const {
-    str->append("<dl><dt>SkPaint:</dt><dd><dl>");
-
-    SkTypeface* typeface = this->getTypeface();
-    if (typeface) {
-        SkDynamicMemoryWStream ostream;
-        typeface->serialize(&ostream);
-        std::unique_ptr<SkStreamAsset> istream(ostream.detachAsStream());
-
-        SkFontDescriptor descriptor;
-        if (!SkFontDescriptor::Deserialize(istream.get(), &descriptor)) {
-            str->append("<dt>FontDescriptor deserialization failed</dt>");
-        } else {
-            str->append("<dt>Font Family Name:</dt><dd>");
-            str->append(descriptor.getFamilyName());
-            str->append("</dd><dt>Font Full Name:</dt><dd>");
-            str->append(descriptor.getFullName());
-            str->append("</dd><dt>Font PS Name:</dt><dd>");
-            str->append(descriptor.getPostscriptName());
-            str->append("</dd>");
-        }
-    }
-
-    str->append("<dt>TextSize:</dt><dd>");
-    str->appendScalar(this->getTextSize());
-    str->append("</dd>");
-
-    str->append("<dt>TextScaleX:</dt><dd>");
-    str->appendScalar(this->getTextScaleX());
-    str->append("</dd>");
-
-    str->append("<dt>TextSkewX:</dt><dd>");
-    str->appendScalar(this->getTextSkewX());
-    str->append("</dd>");
-
-    SkPathEffect* pathEffect = this->getPathEffect();
-    if (pathEffect) {
-        str->append("<dt>PathEffect:</dt><dd>");
-        pathEffect->toString(str);
-        str->append("</dd>");
-    }
-
-    if (const auto* shader = as_SB(this->getShader())) {
-        str->append("<dt>Shader:</dt><dd>");
-        shader->toString(str);
-        str->append("</dd>");
-    }
-
-    if (!this->isSrcOver()) {
-        str->appendf("<dt>Xfermode:</dt><dd>%d</dd>", fBlendMode);
-    }
-
-    SkMaskFilter* maskFilter = this->getMaskFilter();
-    if (maskFilter) {
-        str->append("<dt>MaskFilter:</dt><dd>");
-        as_MFB(maskFilter)->toString(str);
-        str->append("</dd>");
-    }
-
-    SkColorFilter* colorFilter = this->getColorFilter();
-    if (colorFilter) {
-        str->append("<dt>ColorFilter:</dt><dd>");
-        colorFilter->toString(str);
-        str->append("</dd>");
-    }
-
-    SkDrawLooper* looper = this->getLooper();
-    if (looper) {
-        str->append("<dt>DrawLooper:</dt><dd>");
-        looper->toString(str);
-        str->append("</dd>");
-    }
-
-    SkImageFilter* imageFilter = this->getImageFilter();
-    if (imageFilter) {
-        str->append("<dt>ImageFilter:</dt><dd>");
-        imageFilter->toString(str);
-        str->append("</dd>");
-    }
-
-    str->append("<dt>Color:</dt><dd>0x");
-    SkColor color = this->getColor();
-    str->appendHex(color);
-    str->append("</dd>");
-
-    str->append("<dt>Stroke Width:</dt><dd>");
-    str->appendScalar(this->getStrokeWidth());
-    str->append("</dd>");
-
-    str->append("<dt>Stroke Miter:</dt><dd>");
-    str->appendScalar(this->getStrokeMiter());
-    str->append("</dd>");
-
-    str->append("<dt>Flags:</dt><dd>(");
-    if (this->getFlags()) {
-        bool needSeparator = false;
-        SkAddFlagToString(str, this->isAntiAlias(), "AntiAlias", &needSeparator);
-        SkAddFlagToString(str, this->isDither(), "Dither", &needSeparator);
-        SkAddFlagToString(str, this->isFakeBoldText(), "FakeBoldText", &needSeparator);
-        SkAddFlagToString(str, this->isLinearText(), "LinearText", &needSeparator);
-        SkAddFlagToString(str, this->isSubpixelText(), "SubpixelText", &needSeparator);
-        SkAddFlagToString(str, this->isLCDRenderText(), "LCDRenderText", &needSeparator);
-        SkAddFlagToString(str, this->isEmbeddedBitmapText(),
-                          "EmbeddedBitmapText", &needSeparator);
-        SkAddFlagToString(str, this->isAutohinted(), "Autohinted", &needSeparator);
-        SkAddFlagToString(str, this->isVerticalText(), "VerticalText", &needSeparator);
-    } else {
-        str->append("None");
-    }
-    str->append(")</dd>");
-
-    str->append("<dt>FilterLevel:</dt><dd>");
-    static const char* gFilterQualityStrings[] = { "None", "Low", "Medium", "High" };
-    str->append(gFilterQualityStrings[this->getFilterQuality()]);
-    str->append("</dd>");
-
-    str->append("<dt>TextAlign:</dt><dd>");
-    static const char* gTextAlignStrings[SkPaint::kAlignCount] = { "Left", "Center", "Right" };
-    str->append(gTextAlignStrings[this->getTextAlign()]);
-    str->append("</dd>");
-
-    str->append("<dt>CapType:</dt><dd>");
-    static const char* gStrokeCapStrings[SkPaint::kCapCount] = { "Butt", "Round", "Square" };
-    str->append(gStrokeCapStrings[this->getStrokeCap()]);
-    str->append("</dd>");
-
-    str->append("<dt>JoinType:</dt><dd>");
-    static const char* gJoinStrings[SkPaint::kJoinCount] = { "Miter", "Round", "Bevel" };
-    str->append(gJoinStrings[this->getStrokeJoin()]);
-    str->append("</dd>");
-
-    str->append("<dt>Style:</dt><dd>");
-    static const char* gStyleStrings[SkPaint::kStyleCount] = { "Fill", "Stroke", "StrokeAndFill" };
-    str->append(gStyleStrings[this->getStyle()]);
-    str->append("</dd>");
-
-    str->append("<dt>TextEncoding:</dt><dd>");
-    static const char* gTextEncodingStrings[] = { "UTF8", "UTF16", "UTF32", "GlyphID" };
-    str->append(gTextEncodingStrings[this->getTextEncoding()]);
-    str->append("</dd>");
-
-    str->append("<dt>Hinting:</dt><dd>");
-    static const char* gHintingStrings[] = { "None", "Slight", "Normal", "Full" };
-    str->append(gHintingStrings[this->getHinting()]);
-    str->append("</dd>");
-
-    str->append("</dd></dl></dl>");
-}
-
 ///////////////////////////////////////////////////////////////////////////////
 
 static bool has_thick_frame(const SkPaint& paint) {
diff --git a/src/core/SkPathEffect.cpp b/src/core/SkPathEffect.cpp
index 09d7e542c7..e315275196 100644
--- a/src/core/SkPathEffect.cpp
+++ b/src/core/SkPathEffect.cpp
@@ -51,23 +51,10 @@ protected:
     sk_sp<SkPathEffect> fPE0;
     sk_sp<SkPathEffect> fPE1;
 
-    void toString(SkString* str) const override;
-
 private:
     typedef SkPathEffect INHERITED;
 };
 
-void SkPairPathEffect::toString(SkString* str) const {
-    str->appendf("first: ");
-    if (fPE0) {
-        fPE0->toString(str);
-    }
-    str->appendf(" second: ");
-    if (fPE1) {
-        fPE1->toString(str);
-    }
-}
-
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 /** \class SkComposePathEffect
@@ -104,7 +91,6 @@ public:
     }
 
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkComposePathEffect)
 
 #ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK
@@ -130,12 +116,6 @@ sk_sp<SkFlattenable> SkComposePathEffect::CreateProc(SkReadBuffer& buffer) {
     return SkComposePathEffect::Make(std::move(pe0), std::move(pe1));
 }
 
-void SkComposePathEffect::toString(SkString* str) const {
-    str->appendf("SkComposePathEffect: (");
-    this->INHERITED::toString(str);
-    str->appendf(")");
-}
-
 ///////////////////////////////////////////////////////////////////////////////
 
 /** \class SkSumPathEffect
@@ -168,7 +148,6 @@ public:
     }
 
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkSumPathEffect)
 
 #ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK
@@ -194,12 +173,6 @@ sk_sp<SkFlattenable> SkSumPathEffect::CreateProc(SkReadBuffer& buffer) {
     return SkSumPathEffect::Make(pe0, pe1);
 }
 
-void SkSumPathEffect::toString(SkString* str) const {
-    str->appendf("SkSumPathEffect: (");
-    this->INHERITED::toString(str);
-    str->appendf(")");
-}
-
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 sk_sp<SkPathEffect> SkPathEffect::MakeSum(sk_sp<SkPathEffect> first, sk_sp<SkPathEffect> second) {
diff --git a/src/core/SkStringUtils.cpp b/src/core/SkStringUtils.cpp
index 9745b2325b..00d8c8787c 100644
--- a/src/core/SkStringUtils.cpp
+++ b/src/core/SkStringUtils.cpp
@@ -9,16 +9,6 @@
 #include "SkStringUtils.h"
 #include "SkUtils.h"
 
-void SkAddFlagToString(SkString* string, bool flag, const char* flagStr, bool* needSeparator) {
-    if (flag) {
-        if (*needSeparator) {
-            string->append("|");
-        }
-        string->append(flagStr);
-        *needSeparator = true;
-    }
-}
-
 void SkAppendScalar(SkString* str, SkScalar value, SkScalarAsStringType asType) {
     switch (asType) {
         case kHex_SkScalarAsStringType:
diff --git a/src/core/SkStringUtils.h b/src/core/SkStringUtils.h
index f2a1443ff4..ac587d6717 100644
--- a/src/core/SkStringUtils.h
+++ b/src/core/SkStringUtils.h
@@ -12,16 +12,6 @@
 
 class SkString;
 
-/**
- * Add 'flagStr' to 'string' and set 'needSeparator' to true only if 'flag' is
- * true. If 'needSeparator' is true append a '|' before 'flagStr'. This method
- * is used to streamline the creation of ASCII flag strings within the toString
- * methods.
- */
-void SkAddFlagToString(SkString* string, bool flag,
-                       const char* flagStr, bool* needSeparator);
-
-
 enum SkScalarAsStringType {
     kDec_SkScalarAsStringType,
     kHex_SkScalarAsStringType,
diff --git a/src/effects/Sk1DPathEffect.cpp b/src/effects/Sk1DPathEffect.cpp
index 57f2d2b6ce..1837479147 100644
--- a/src/effects/Sk1DPathEffect.cpp
+++ b/src/effects/Sk1DPathEffect.cpp
@@ -194,14 +194,6 @@ SkScalar SkPath1DPathEffect::next(SkPath* dst, SkScalar distance,
     return fAdvance;
 }
 
-
-void SkPath1DPathEffect::toString(SkString* str) const {
-    str->appendf("SkPath1DPathEffect: (");
-    // TODO: add path and style
-    str->appendf("advance: %.2f phase %.2f", fAdvance, fInitialOffset);
-    str->appendf(")");
-}
-
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 sk_sp<SkPathEffect> SkPath1DPathEffect::Make(const SkPath& path, SkScalar advance, SkScalar phase,
diff --git a/src/effects/Sk2DPathEffect.cpp b/src/effects/Sk2DPathEffect.cpp
index a541b91476..6c2c4c2854 100644
--- a/src/effects/Sk2DPathEffect.cpp
+++ b/src/effects/Sk2DPathEffect.cpp
@@ -74,13 +74,6 @@ void Sk2DPathEffect::flatten(SkWriteBuffer& buffer) const {
     buffer.writeMatrix(fMatrix);
 }
 
-void Sk2DPathEffect::toString(SkString* str) const {
-    str->appendf("(matrix: %.2f %.2f %.2f %.2f %.2f %.2f %.2f %.2f %.2f)",
-            fMatrix[SkMatrix::kMScaleX], fMatrix[SkMatrix::kMSkewX],  fMatrix[SkMatrix::kMTransX],
-            fMatrix[SkMatrix::kMSkewY],  fMatrix[SkMatrix::kMScaleY], fMatrix[SkMatrix::kMTransY],
-            fMatrix[SkMatrix::kMPersp0], fMatrix[SkMatrix::kMPersp1], fMatrix[SkMatrix::kMPersp2]);
-}
-
 ///////////////////////////////////////////////////////////////////////////////
 
 bool SkLine2DPathEffect::filterPath(SkPath* dst, const SkPath& src,
@@ -117,14 +110,6 @@ void SkLine2DPathEffect::flatten(SkWriteBuffer &buffer) const {
     buffer.writeScalar(fWidth);
 }
 
-
-void SkLine2DPathEffect::toString(SkString* str) const {
-    str->appendf("SkLine2DPathEffect: (");
-    this->INHERITED::toString(str);
-    str->appendf("width: %f", fWidth);
-    str->appendf(")");
-}
-
 ///////////////////////////////////////////////////////////////////////////////
 
 SkPath2DPathEffect::SkPath2DPathEffect(const SkMatrix& m, const SkPath& p)
@@ -148,11 +133,3 @@ void SkPath2DPathEffect::next(const SkPoint& loc, int u, int v,
                               SkPath* dst) const {
     dst->addPath(fPath, loc.fX, loc.fY);
 }
-
-void SkPath2DPathEffect::toString(SkString* str) const {
-    str->appendf("SkPath2DPathEffect: (");
-    this->INHERITED::toString(str);
-    // TODO: print out path information
-    str->appendf(")");
-}
-
diff --git a/src/effects/SkAlphaThresholdFilter.cpp b/src/effects/SkAlphaThresholdFilter.cpp
index f09ec50b67..5bd2571842 100644
--- a/src/effects/SkAlphaThresholdFilter.cpp
+++ b/src/effects/SkAlphaThresholdFilter.cpp
@@ -31,7 +31,6 @@ public:
                                SkScalar outerThreshold, sk_sp<SkImageFilter> input,
                                const CropRect* cropRect = nullptr);
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkAlphaThresholdFilterImpl)
     friend void SkAlphaThresholdFilter::InitializeFlattenables();
 
@@ -281,10 +280,3 @@ const {
     }
     return this->refMe();
 }
-
-void SkAlphaThresholdFilterImpl::toString(SkString* str) const {
-    str->appendf("SkAlphaThresholdImageFilter: (");
-    str->appendf("inner: %f outer: %f", fInnerThreshold, fOuterThreshold);
-    str->append(")");
-}
-
diff --git a/src/effects/SkArithmeticImageFilter.cpp b/src/effects/SkArithmeticImageFilter.cpp
index c022ec955e..578cc0d350 100644
--- a/src/effects/SkArithmeticImageFilter.cpp
+++ b/src/effects/SkArithmeticImageFilter.cpp
@@ -37,7 +37,6 @@ public:
                               sk_sp<SkImageFilter> inputs[2], const CropRect* cropRect)
             : INHERITED(inputs, 2, cropRect), fK{k1, k2, k3, k4}, fEnforcePMColor(enforcePMColor) {}
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(ArithmeticImageFilterImpl)
 
 protected:
@@ -432,22 +431,6 @@ const {
     return this->refMe();
 }
 
-void ArithmeticImageFilterImpl::toString(SkString* str) const {
-    str->appendf("SkArithmeticImageFilter: (");
-    str->appendf("K[]: (%f %f %f %f)", fK[0], fK[1], fK[2], fK[3]);
-    if (this->getInput(0)) {
-        str->appendf("foreground: (");
-        this->getInput(0)->toString(str);
-        str->appendf(")");
-    }
-    if (this->getInput(1)) {
-        str->appendf("background: (");
-        this->getInput(1)->toString(str);
-        str->appendf(")");
-    }
-    str->append(")");
-}
-
 sk_sp<SkImageFilter> SkArithmeticImageFilter::Make(float k1, float k2, float k3, float k4,
                                                    bool enforcePMColor,
                                                    sk_sp<SkImageFilter> background,
diff --git a/src/effects/SkColorFilterImageFilter.cpp b/src/effects/SkColorFilterImageFilter.cpp
index 845a26ac0f..fcbe2261db 100644
--- a/src/effects/SkColorFilterImageFilter.cpp
+++ b/src/effects/SkColorFilterImageFilter.cpp
@@ -145,18 +145,3 @@ bool SkColorFilterImageFilter::onIsColorFilterNode(SkColorFilter** filter) const
 bool SkColorFilterImageFilter::affectsTransparentBlack() const {
     return fColorFilter->affectsTransparentBlack();
 }
-
-void SkColorFilterImageFilter::toString(SkString* str) const {
-    str->appendf("SkColorFilterImageFilter: (");
-
-    str->appendf("input: (");
-
-    if (this->getInput(0)) {
-        this->getInput(0)->toString(str);
-    }
-
-    str->appendf(") color filter: ");
-    fColorFilter->toString(str);
-
-    str->append(")");
-}
diff --git a/src/effects/SkColorMatrixFilter.cpp b/src/effects/SkColorMatrixFilter.cpp
index 7a562b4aa0..c68c47e884 100644
--- a/src/effects/SkColorMatrixFilter.cpp
+++ b/src/effects/SkColorMatrixFilter.cpp
@@ -72,8 +72,6 @@ public:
     }
 #endif
 
-    void toString(SkString* str) const override { fMatrixFilter->toString(str); }
-
 private:
     SkColor              fMul, fAdd;
     sk_sp<SkColorFilter> fMatrixFilter;
diff --git a/src/effects/SkComposeImageFilter.cpp b/src/effects/SkComposeImageFilter.cpp
index 51cec9c671..842588d9c6 100644
--- a/src/effects/SkComposeImageFilter.cpp
+++ b/src/effects/SkComposeImageFilter.cpp
@@ -88,17 +88,3 @@ sk_sp<SkFlattenable> SkComposeImageFilter::CreateProc(SkReadBuffer& buffer) {
     return SkComposeImageFilter::Make(common.getInput(0), common.getInput(1));
 }
 
-void SkComposeImageFilter::toString(SkString* str) const {
-    SkImageFilter* outer = getInput(0);
-    SkImageFilter* inner = getInput(1);
-
-    str->appendf("SkComposeImageFilter: (");
-
-    str->appendf("outer: ");
-    outer->toString(str);
-
-    str->appendf("inner: ");
-    inner->toString(str);
-
-    str->appendf(")");
-}
diff --git a/src/effects/SkCornerPathEffect.cpp b/src/effects/SkCornerPathEffect.cpp
index ec137b9c60..a88bc3224c 100644
--- a/src/effects/SkCornerPathEffect.cpp
+++ b/src/effects/SkCornerPathEffect.cpp
@@ -151,9 +151,3 @@ sk_sp<SkFlattenable> SkCornerPathEffect::CreateProc(SkReadBuffer& buffer) {
 void SkCornerPathEffect::flatten(SkWriteBuffer& buffer) const {
     buffer.writeScalar(fRadius);
 }
-
-void SkCornerPathEffect::toString(SkString* str) const {
-    str->appendf("SkCornerPathEffect: (");
-    str->appendf("radius: %.2f", fRadius);
-    str->appendf(")");
-}
diff --git a/src/effects/SkDashImpl.h b/src/effects/SkDashImpl.h
index 13ec155847..7f1de776c3 100644
--- a/src/effects/SkDashImpl.h
+++ b/src/effects/SkDashImpl.h
@@ -21,8 +21,6 @@ public:
 
     DashType asADash(DashInfo* info) const override;
 
-    void toString(SkString* str) const override;
-
     Factory getFactory() const override { return CreateProc; }
 
 #ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK
diff --git a/src/effects/SkDashPathEffect.cpp b/src/effects/SkDashPathEffect.cpp
index 1a2c635a7f..c1f5f0a2cc 100644
--- a/src/effects/SkDashPathEffect.cpp
+++ b/src/effects/SkDashPathEffect.cpp
@@ -381,18 +381,6 @@ sk_sp<SkFlattenable> SkDashImpl::CreateProc(SkReadBuffer& buffer) {
     return nullptr;
 }
 
-void SkDashImpl::toString(SkString* str) const {
-    str->appendf("SkDashPathEffect: (");
-    str->appendf("count: %d phase %.2f intervals: (", fCount, fPhase);
-    for (int i = 0; i < fCount; ++i) {
-        str->appendf("%.2f", fIntervals[i]);
-        if (i < fCount-1) {
-            str->appendf(", ");
-        }
-    }
-    str->appendf("))");
-}
-
 //////////////////////////////////////////////////////////////////////////////////////////////////
 
 sk_sp<SkPathEffect> SkDashPathEffect::Make(const SkScalar intervals[], int count, SkScalar phase) {
diff --git a/src/effects/SkDiscretePathEffect.cpp b/src/effects/SkDiscretePathEffect.cpp
index 57d8f9639e..46cd42bece 100644
--- a/src/effects/SkDiscretePathEffect.cpp
+++ b/src/effects/SkDiscretePathEffect.cpp
@@ -143,9 +143,3 @@ void SkDiscretePathEffect::flatten(SkWriteBuffer& buffer) const {
     buffer.writeScalar(fPerterb);
     buffer.writeUInt(fSeedAssist);
 }
-
-void SkDiscretePathEffect::toString(SkString* str) const {
-    str->appendf("SkDiscretePathEffect: (");
-    str->appendf("segLength: %.2f deviation: %.2f seed %d", fSegLength, fPerterb, fSeedAssist);
-    str->append(")");
-}
diff --git a/src/effects/SkDisplacementMapEffect.cpp b/src/effects/SkDisplacementMapEffect.cpp
index f1b704e1c8..6be0a26106 100644
--- a/src/effects/SkDisplacementMapEffect.cpp
+++ b/src/effects/SkDisplacementMapEffect.cpp
@@ -405,20 +405,6 @@ SkIRect SkDisplacementMapEffect::onFilterBounds(const SkIRect& src, const SkMatr
     return src;
 }
 
-void SkDisplacementMapEffect::toString(SkString* str) const {
-    str->appendf("SkDisplacementMapEffect: (");
-    str->appendf("scale: %f ", fScale);
-    str->appendf("displacement: (");
-    if (this->getDisplacementInput()) {
-        this->getDisplacementInput()->toString(str);
-    }
-    str->appendf(") color: (");
-    if (this->getColorInput()) {
-        this->getColorInput()->toString(str);
-    }
-    str->appendf("))");
-}
-
 ///////////////////////////////////////////////////////////////////////////////
 
 #if SK_SUPPORT_GPU
diff --git a/src/effects/SkDropShadowImageFilter.cpp b/src/effects/SkDropShadowImageFilter.cpp
index 1a0ce2ee6b..36a9d7110d 100644
--- a/src/effects/SkDropShadowImageFilter.cpp
+++ b/src/effects/SkDropShadowImageFilter.cpp
@@ -160,24 +160,3 @@ SkIRect SkDropShadowImageFilter::onFilterNodeBounds(const SkIRect& src, const Sk
     return dst;
 }
 
-void SkDropShadowImageFilter::toString(SkString* str) const {
-    str->appendf("SkDropShadowImageFilter: (");
-
-    str->appendf("dX: %f ", fDx);
-    str->appendf("dY: %f ", fDy);
-    str->appendf("sigmaX: %f ", fSigmaX);
-    str->appendf("sigmaY: %f ", fSigmaY);
-
-    str->append("Color: ");
-    str->appendHex(fColor);
-
-    static const char* gModeStrings[] = {
-        "kDrawShadowAndForeground", "kDrawShadowOnly"
-    };
-
-    static_assert(kShadowModeCount == SK_ARRAY_COUNT(gModeStrings), "enum_mismatch");
-
-    str->appendf(" mode: %s", gModeStrings[fShadowMode]);
-
-    str->append(")");
-}
diff --git a/src/effects/SkEmbossMaskFilter.cpp b/src/effects/SkEmbossMaskFilter.cpp
index 4a4c8d0e34..ef26520172 100644
--- a/src/effects/SkEmbossMaskFilter.cpp
+++ b/src/effects/SkEmbossMaskFilter.cpp
@@ -140,22 +140,3 @@ void SkEmbossMaskFilter::flatten(SkWriteBuffer& buffer) const {
     buffer.writeByteArray(&tmpLight, sizeof(tmpLight));
     buffer.writeScalar(fBlurSigma);
 }
-
-void SkEmbossMaskFilter::toString(SkString* str) const {
-    str->append("SkEmbossMaskFilter: (");
-
-    str->append("direction: (");
-    str->appendScalar(fLight.fDirection[0]);
-    str->append(", ");
-    str->appendScalar(fLight.fDirection[1]);
-    str->append(", ");
-    str->appendScalar(fLight.fDirection[2]);
-    str->append(") ");
-
-    str->appendf("ambient: %d specular: %d ",
-        fLight.fAmbient, fLight.fSpecular);
-
-    str->append("blurSigma: ");
-    str->appendScalar(fBlurSigma);
-    str->append(")");
-}
diff --git a/src/effects/SkEmbossMaskFilter.h b/src/effects/SkEmbossMaskFilter.h
index 67d068cdb7..7b5878668a 100644
--- a/src/effects/SkEmbossMaskFilter.h
+++ b/src/effects/SkEmbossMaskFilter.h
@@ -33,7 +33,6 @@ public:
     bool filterMask(SkMask* dst, const SkMask& src, const SkMatrix&,
                     SkIPoint* margin) const override;
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkEmbossMaskFilter)
 
 protected:
diff --git a/src/effects/SkHighContrastFilter.cpp b/src/effects/SkHighContrastFilter.cpp
index b805212f18..607033ef20 100644
--- a/src/effects/SkHighContrastFilter.cpp
+++ b/src/effects/SkHighContrastFilter.cpp
@@ -45,8 +45,6 @@ public:
                         SkArenaAlloc* scratch,
                         bool shaderIsOpaque) const override;
 
-    void toString(SkString* str) const override;
-
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkHighContrast_Filter)
 
 protected:
@@ -157,10 +155,6 @@ sk_sp<SkColorFilter> SkHighContrastFilter::Make(
     return sk_make_sp<SkHighContrast_Filter>(config);
 }
 
-void SkHighContrast_Filter::toString(SkString* str) const {
-    str->append("SkHighContrastColorFilter ");
-}
-
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkHighContrastFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkHighContrast_Filter)
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END
diff --git a/src/effects/SkImageSource.cpp b/src/effects/SkImageSource.cpp
index 0f48fb0c97..960de37b33 100644
--- a/src/effects/SkImageSource.cpp
+++ b/src/effects/SkImageSource.cpp
@@ -157,12 +157,3 @@ SkIRect SkImageSource::onFilterNodeBounds(const SkIRect& src, const SkMatrix& ct
     return dstRect.roundOut();
 }
 
-void SkImageSource::toString(SkString* str) const {
-    str->appendf("SkImageSource: (");
-    str->appendf("src: (%f,%f,%f,%f) dst: (%f,%f,%f,%f) ",
-                 fSrcRect.fLeft, fSrcRect.fTop, fSrcRect.fRight, fSrcRect.fBottom,
-                 fDstRect.fLeft, fDstRect.fTop, fDstRect.fRight, fDstRect.fBottom);
-    str->appendf("image: (%d,%d)",
-                 fImage->width(), fImage->height());
-    str->append(")");
-}
diff --git a/src/effects/SkLayerDrawLooper.cpp b/src/effects/SkLayerDrawLooper.cpp
index db61e08c4f..1610809456 100644
--- a/src/effects/SkLayerDrawLooper.cpp
+++ b/src/effects/SkLayerDrawLooper.cpp
@@ -279,62 +279,6 @@ sk_sp<SkFlattenable> SkLayerDrawLooper::CreateProc(SkReadBuffer& buffer) {
     return builder.detach();
 }
 
-void SkLayerDrawLooper::toString(SkString* str) const {
-    str->appendf("SkLayerDrawLooper (%d): ", fCount);
-
-    Rec* rec = fRecs;
-    for (int i = 0; i < fCount; i++) {
-        str->appendf("%d: paintBits: (", i);
-        if (0 == rec->fInfo.fPaintBits) {
-            str->append("None");
-        } else if (kEntirePaint_Bits == rec->fInfo.fPaintBits) {
-            str->append("EntirePaint");
-        } else {
-            bool needSeparator = false;
-            SkAddFlagToString(str, SkToBool(kStyle_Bit & rec->fInfo.fPaintBits), "Style",
-                              &needSeparator);
-            SkAddFlagToString(str, SkToBool(kTextSkewX_Bit & rec->fInfo.fPaintBits), "TextSkewX",
-                              &needSeparator);
-            SkAddFlagToString(str, SkToBool(kPathEffect_Bit & rec->fInfo.fPaintBits), "PathEffect",
-                              &needSeparator);
-            SkAddFlagToString(str, SkToBool(kMaskFilter_Bit & rec->fInfo.fPaintBits), "MaskFilter",
-                              &needSeparator);
-            SkAddFlagToString(str, SkToBool(kShader_Bit & rec->fInfo.fPaintBits), "Shader",
-                              &needSeparator);
-            SkAddFlagToString(str, SkToBool(kColorFilter_Bit & rec->fInfo.fPaintBits), "ColorFilter",
-                              &needSeparator);
-            SkAddFlagToString(str, SkToBool(kXfermode_Bit & rec->fInfo.fPaintBits), "Xfermode",
-                              &needSeparator);
-        }
-        str->append(") ");
-
-        static const char* gModeStrings[(int)SkBlendMode::kLastMode+1] = {
-            "kClear", "kSrc", "kDst", "kSrcOver", "kDstOver", "kSrcIn", "kDstIn",
-            "kSrcOut", "kDstOut", "kSrcATop", "kDstATop", "kXor", "kPlus",
-            "kMultiply", "kScreen", "kOverlay", "kDarken", "kLighten", "kColorDodge",
-            "kColorBurn", "kHardLight", "kSoftLight", "kDifference", "kExclusion"
-        };
-
-        str->appendf("mode: %s ", gModeStrings[(int)rec->fInfo.fColorMode]);
-
-        str->append("offset: (");
-        str->appendScalar(rec->fInfo.fOffset.fX);
-        str->append(", ");
-        str->appendScalar(rec->fInfo.fOffset.fY);
-        str->append(") ");
-
-        str->append("postTranslate: ");
-        if (rec->fInfo.fPostTranslate) {
-            str->append("true ");
-        } else {
-            str->append("false ");
-        }
-
-        rec->fPaint.toString(str);
-        rec = rec->fNext;
-    }
-}
-
 SkLayerDrawLooper::Builder::Builder()
         : fRecs(nullptr),
           fTopRec(nullptr),
diff --git a/src/effects/SkLightingImageFilter.cpp b/src/effects/SkLightingImageFilter.cpp
index 7c4f9b790d..296c4927b3 100644
--- a/src/effects/SkLightingImageFilter.cpp
+++ b/src/effects/SkLightingImageFilter.cpp
@@ -531,7 +531,6 @@ public:
                                      sk_sp<SkImageFilter>,
                                      const CropRect*);
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDiffuseLightingImageFilter)
     SkScalar kd() const { return fKD; }
 
@@ -566,7 +565,6 @@ public:
                                      SkScalar ks, SkScalar shininess,
                                      sk_sp<SkImageFilter>, const CropRect*);
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkSpecularLightingImageFilter)
 
     SkScalar ks() const { return fKS; }
@@ -1372,12 +1370,6 @@ const {
     return this->refMe();
 }
 
-void SkDiffuseLightingImageFilter::toString(SkString* str) const {
-    str->appendf("SkDiffuseLightingImageFilter: (");
-    str->appendf("kD: %f\n", fKD);
-    str->append(")");
-}
-
 #if SK_SUPPORT_GPU
 std::unique_ptr<GrFragmentProcessor> SkDiffuseLightingImageFilter::makeFragmentProcessor(
         sk_sp<GrTextureProxy> proxy,
@@ -1527,12 +1519,6 @@ const {
     return this->refMe();
 }
 
-void SkSpecularLightingImageFilter::toString(SkString* str) const {
-    str->appendf("SkSpecularLightingImageFilter: (");
-    str->appendf("kS: %f shininess: %f", fKS, fShininess);
-    str->append(")");
-}
-
 #if SK_SUPPORT_GPU
 std::unique_ptr<GrFragmentProcessor> SkSpecularLightingImageFilter::makeFragmentProcessor(
         sk_sp<GrTextureProxy> proxy,
diff --git a/src/effects/SkLumaColorFilter.cpp b/src/effects/SkLumaColorFilter.cpp
index 847d5f929f..12d6dd877b 100644
--- a/src/effects/SkLumaColorFilter.cpp
+++ b/src/effects/SkLumaColorFilter.cpp
@@ -37,10 +37,6 @@ sk_sp<SkFlattenable> SkLumaColorFilter::CreateProc(SkReadBuffer&) {
 
 void SkLumaColorFilter::flatten(SkWriteBuffer&) const {}
 
-void SkLumaColorFilter::toString(SkString* str) const {
-    str->append("SkLumaColorFilter ");
-}
-
 #if SK_SUPPORT_GPU
 std::unique_ptr<GrFragmentProcessor> SkLumaColorFilter::asFragmentProcessor(
         GrContext*, const GrColorSpaceInfo&) const {
diff --git a/src/effects/SkMagnifierImageFilter.cpp b/src/effects/SkMagnifierImageFilter.cpp
index 3a6679d2e3..7df30cee72 100644
--- a/src/effects/SkMagnifierImageFilter.cpp
+++ b/src/effects/SkMagnifierImageFilter.cpp
@@ -201,11 +201,3 @@ sk_sp<SkImageFilter> SkMagnifierImageFilter::onMakeColorSpace(SkColorSpaceXforme
     }
     return this->refMe();
 }
-
-void SkMagnifierImageFilter::toString(SkString* str) const {
-    str->appendf("SkMagnifierImageFilter: (");
-    str->appendf("src: (%f,%f,%f,%f) ",
-                 fSrcRect.fLeft, fSrcRect.fTop, fSrcRect.fRight, fSrcRect.fBottom);
-    str->appendf("inset: %f", fInset);
-    str->append(")");
-}
diff --git a/src/effects/SkMatrixConvolutionImageFilter.cpp b/src/effects/SkMatrixConvolutionImageFilter.cpp
index 585103a008..9e71ab629e 100644
--- a/src/effects/SkMatrixConvolutionImageFilter.cpp
+++ b/src/effects/SkMatrixConvolutionImageFilter.cpp
@@ -480,18 +480,3 @@ bool SkMatrixConvolutionImageFilter::affectsTransparentBlack() const {
     // pixels it will affect in object-space.
     return kRepeat_TileMode != fTileMode;
 }
-
-void SkMatrixConvolutionImageFilter::toString(SkString* str) const {
-    str->appendf("SkMatrixConvolutionImageFilter: (");
-    str->appendf("size: (%d,%d) kernel: (", fKernelSize.width(), fKernelSize.height());
-    for (int y = 0; y < fKernelSize.height(); y++) {
-        for (int x = 0; x < fKernelSize.width(); x++) {
-            str->appendf("%f ", fKernel[y * fKernelSize.width() + x]);
-        }
-    }
-    str->appendf(")");
-    str->appendf("gain: %f bias: %f ", fGain, fBias);
-    str->appendf("offset: (%d, %d) ", fKernelOffset.fX, fKernelOffset.fY);
-    str->appendf("convolveAlpha: %s", fConvolveAlpha ? "true" : "false");
-    str->append(")");
-}
diff --git a/src/effects/SkMergeImageFilter.cpp b/src/effects/SkMergeImageFilter.cpp
index debe332e84..3225ba8821 100644
--- a/src/effects/SkMergeImageFilter.cpp
+++ b/src/effects/SkMergeImageFilter.cpp
@@ -122,15 +122,3 @@ void SkMergeImageFilter::flatten(SkWriteBuffer& buffer) const {
     this->INHERITED::flatten(buffer);
 }
 
-void SkMergeImageFilter::toString(SkString* str) const {
-    str->appendf("SkMergeImageFilter: (");
-
-    for (int i = 0; i < this->countInputs(); ++i) {
-        SkImageFilter* filter = this->getInput(i);
-        str->appendf("%d: (", i);
-        filter->toString(str);
-        str->appendf(")");
-    }
-
-    str->append(")");
-}
diff --git a/src/effects/SkMorphologyImageFilter.cpp b/src/effects/SkMorphologyImageFilter.cpp
index 9d87aa033b..cbd2772485 100644
--- a/src/effects/SkMorphologyImageFilter.cpp
+++ b/src/effects/SkMorphologyImageFilter.cpp
@@ -114,18 +114,6 @@ sk_sp<SkFlattenable> SkDilateImageFilter::CreateProc(SkReadBuffer& buffer) {
     return Make(width, height, common.getInput(0), &common.cropRect());
 }
 
-void SkErodeImageFilter::toString(SkString* str) const {
-    str->appendf("SkErodeImageFilter: (");
-    str->appendf("radius: (%d,%d)", this->radius().fWidth, this->radius().fHeight);
-    str->append(")");
-}
-
-void SkDilateImageFilter::toString(SkString* str) const {
-    str->appendf("SkDilateImageFilter: (");
-    str->appendf("radius: (%d,%d)", this->radius().fWidth, this->radius().fHeight);
-    str->append(")");
-}
-
 #if SK_SUPPORT_GPU
 
 ///////////////////////////////////////////////////////////////////////////////
diff --git a/src/effects/SkOffsetImageFilter.cpp b/src/effects/SkOffsetImageFilter.cpp
index 19aa68ec2f..8dacc11120 100644
--- a/src/effects/SkOffsetImageFilter.cpp
+++ b/src/effects/SkOffsetImageFilter.cpp
@@ -125,13 +125,3 @@ SkOffsetImageFilter::SkOffsetImageFilter(SkScalar dx, SkScalar dy,
     : INHERITED(&input, 1, cropRect) {
     fOffset.set(dx, dy);
 }
-
-void SkOffsetImageFilter::toString(SkString* str) const {
-    str->appendf("SkOffsetImageFilter: (");
-    str->appendf("offset: (%f, %f) ", fOffset.fX, fOffset.fY);
-    str->append("input: (");
-    if (this->getInput(0)) {
-        this->getInput(0)->toString(str);
-    }
-    str->append("))");
-}
diff --git a/src/effects/SkOverdrawColorFilter.cpp b/src/effects/SkOverdrawColorFilter.cpp
index 01dab6544f..71dbb72011 100644
--- a/src/effects/SkOverdrawColorFilter.cpp
+++ b/src/effects/SkOverdrawColorFilter.cpp
@@ -36,14 +36,6 @@ void SkOverdrawColorFilter::onAppendStages(SkRasterPipeline* p,
     p->append(SkRasterPipeline::callback, ctx);
 }
 
-void SkOverdrawColorFilter::toString(SkString* str) const {
-    str->append("SkOverdrawColorFilter (");
-    for (int i = 0; i < kNumColors; i++) {
-        str->appendf("%d: %x\n", i, fColors[i]);
-    }
-    str->append(")");
-}
-
 void SkOverdrawColorFilter::flatten(SkWriteBuffer& buffer) const {
     buffer.writeByteArray(fColors, kNumColors * sizeof(SkPMColor));
 }
diff --git a/src/effects/SkPaintImageFilter.cpp b/src/effects/SkPaintImageFilter.cpp
index 235f76f6a1..c0be41fdb9 100644
--- a/src/effects/SkPaintImageFilter.cpp
+++ b/src/effects/SkPaintImageFilter.cpp
@@ -81,9 +81,3 @@ sk_sp<SkImageFilter> SkPaintImageFilter::onMakeColorSpace(SkColorSpaceXformer* x
 bool SkPaintImageFilter::affectsTransparentBlack() const {
     return true;
 }
-
-void SkPaintImageFilter::toString(SkString* str) const {
-    str->appendf("SkPaintImageFilter: (");
-    fPaint.toString(str);
-    str->append(")");
-}
diff --git a/src/effects/SkPictureImageFilter.cpp b/src/effects/SkPictureImageFilter.cpp
index 66fea1fe3f..df11e6c0df 100644
--- a/src/effects/SkPictureImageFilter.cpp
+++ b/src/effects/SkPictureImageFilter.cpp
@@ -131,15 +131,3 @@ sk_sp<SkImageFilter> SkPictureImageFilter::onMakeColorSpace(SkColorSpaceXformer*
 
     return sk_sp<SkImageFilter>(new SkPictureImageFilter(fPicture, fCropRect, std::move(dstCS)));
 }
-
-void SkPictureImageFilter::toString(SkString* str) const {
-    str->appendf("SkPictureImageFilter: (");
-    str->appendf("crop: (%f,%f,%f,%f) ",
-                 fCropRect.fLeft, fCropRect.fTop, fCropRect.fRight, fCropRect.fBottom);
-    if (fPicture) {
-        str->appendf("picture: (%f,%f,%f,%f)",
-                     fPicture->cullRect().fLeft, fPicture->cullRect().fTop,
-                     fPicture->cullRect().fRight, fPicture->cullRect().fBottom);
-    }
-    str->append(")");
-}
diff --git a/src/effects/SkShaderMaskFilter.cpp b/src/effects/SkShaderMaskFilter.cpp
index cfa15c5bad..f2160a17a3 100644
--- a/src/effects/SkShaderMaskFilter.cpp
+++ b/src/effects/SkShaderMaskFilter.cpp
@@ -27,7 +27,6 @@ public:
 
     bool asABlur(BlurRec*) const override { return false; }
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkShaderMF)
 
 protected:
@@ -47,10 +46,6 @@ private:
     typedef SkMaskFilter INHERITED;
 };
 
-void SkShaderMF::toString(SkString* str) const {
-    str->set("SkShaderMF:");
-}
-
 sk_sp<SkFlattenable> SkShaderMF::CreateProc(SkReadBuffer& buffer) {
     return SkShaderMaskFilter::Make(buffer.readShader());
 }
diff --git a/src/effects/SkTableColorFilter.cpp b/src/effects/SkTableColorFilter.cpp
index 47d6ae2d8c..fcf76dcbae 100644
--- a/src/effects/SkTableColorFilter.cpp
+++ b/src/effects/SkTableColorFilter.cpp
@@ -90,8 +90,6 @@ public:
             GrContext*, const GrColorSpaceInfo&) const override;
 #endif
 
-    void toString(SkString* str) const override;
-
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkTable_ColorFilter)
 
     enum {
@@ -140,35 +138,6 @@ private:
     typedef SkColorFilter INHERITED;
 };
 
-void SkTable_ColorFilter::toString(SkString* str) const {
-    const uint8_t* table = fStorage;
-    const uint8_t* tableA = gIdentityTable;
-    const uint8_t* tableR = gIdentityTable;
-    const uint8_t* tableG = gIdentityTable;
-    const uint8_t* tableB = gIdentityTable;
-    if (fFlags & kA_Flag) {
-        tableA = table; table += 256;
-    }
-    if (fFlags & kR_Flag) {
-        tableR = table; table += 256;
-    }
-    if (fFlags & kG_Flag) {
-        tableG = table; table += 256;
-    }
-    if (fFlags & kB_Flag) {
-        tableB = table;
-    }
-
-    str->append("SkTable_ColorFilter (");
-
-    for (int i = 0; i < 256; ++i) {
-        str->appendf("%d: %d,%d,%d,%d\n",
-                     i, tableR[i], tableG[i], tableB[i], tableA[i]);
-    }
-
-    str->append(")");
-}
-
 static const uint8_t gCountNibBits[] = {
     0, 1, 1, 2,
     1, 2, 2, 3,
diff --git a/src/effects/SkTableMaskFilter.cpp b/src/effects/SkTableMaskFilter.cpp
index 2df2fa7f14..8ff58ec89d 100644
--- a/src/effects/SkTableMaskFilter.cpp
+++ b/src/effects/SkTableMaskFilter.cpp
@@ -18,7 +18,6 @@ public:
     SkMask::Format getFormat() const override;
     bool filterMask(SkMask*, const SkMask&, const SkMatrix&, SkIPoint*) const override;
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkTableMaskFilterImpl)
 
 protected:
@@ -167,15 +166,3 @@ void SkTableMaskFilter::MakeClipTable(uint8_t table[256], uint8_t min,
     SkDebugf("\n\n");
 #endif
 }
-
-void SkTableMaskFilterImpl::toString(SkString* str) const {
-    str->append("SkTableMaskFilter: (");
-
-    str->append("table: ");
-    for (int i = 0; i < 255; ++i) {
-        str->appendf("%d, ", fTable[i]);
-    }
-    str->appendf("%d", fTable[255]);
-
-    str->append(")");
-}
diff --git a/src/effects/SkTileImageFilter.cpp b/src/effects/SkTileImageFilter.cpp
index f96af87a81..7ced09ec6e 100644
--- a/src/effects/SkTileImageFilter.cpp
+++ b/src/effects/SkTileImageFilter.cpp
@@ -158,17 +158,3 @@ void SkTileImageFilter::flatten(SkWriteBuffer& buffer) const {
     buffer.writeRect(fSrcRect);
     buffer.writeRect(fDstRect);
 }
-
-void SkTileImageFilter::toString(SkString* str) const {
-    str->appendf("SkTileImageFilter: (");
-    str->appendf("src: %.2f %.2f %.2f %.2f",
-                 fSrcRect.fLeft, fSrcRect.fTop, fSrcRect.fRight, fSrcRect.fBottom);
-    str->appendf(" dst: %.2f %.2f %.2f %.2f",
-                 fDstRect.fLeft, fDstRect.fTop, fDstRect.fRight, fDstRect.fBottom);
-    if (this->getInput(0)) {
-        str->appendf("input: (");
-        this->getInput(0)->toString(str);
-        str->appendf(")");
-    }
-    str->append(")");
-}
diff --git a/src/effects/SkToSRGBColorFilter.cpp b/src/effects/SkToSRGBColorFilter.cpp
index 8ea0826c2f..5831bf0b1a 100644
--- a/src/effects/SkToSRGBColorFilter.cpp
+++ b/src/effects/SkToSRGBColorFilter.cpp
@@ -70,11 +70,6 @@ void SkToSRGBColorFilter::flatten(SkWriteBuffer& buffer) const {
     buffer.writeDataAsByteArray(fSrcColorSpace->serialize().get());
 }
 
-void SkToSRGBColorFilter::toString(SkString* str) const {
-    // TODO
-    str->append("SkToSRGBColorFilter ");
-}
-
 #if SK_SUPPORT_GPU
 std::unique_ptr<GrFragmentProcessor> SkToSRGBColorFilter::asFragmentProcessor(
         GrContext*, const GrColorSpaceInfo&) const {
diff --git a/src/effects/SkTrimPE.h b/src/effects/SkTrimPE.h
index b7ed0c7c00..0f2998724b 100644
--- a/src/effects/SkTrimPE.h
+++ b/src/effects/SkTrimPE.h
@@ -19,7 +19,6 @@ public:
 
     bool filterPath(SkPath* dst, const SkPath& src, SkStrokeRec*, const SkRect*) const override;
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkTrimPE)
 
 protected:
diff --git a/src/effects/SkTrimPathEffect.cpp b/src/effects/SkTrimPathEffect.cpp
index d63393a4a6..8c3f56e2ba 100644
--- a/src/effects/SkTrimPathEffect.cpp
+++ b/src/effects/SkTrimPathEffect.cpp
@@ -97,10 +97,6 @@ sk_sp<SkFlattenable> SkTrimPE::CreateProc(SkReadBuffer& buffer) {
         (mode & 1) ? SkTrimPathEffect::Mode::kInverted : SkTrimPathEffect::Mode::kNormal);
 }
 
-void SkTrimPE::toString(SkString* str) const {
-    str->appendf("SkTrimPathEffect: (%g %g)", fStartT, fStopT);
-}
-
 //////////////////////////////////////////////////////////////////////////////////////////////////
 
 sk_sp<SkPathEffect> SkTrimPathEffect::Make(SkScalar startT, SkScalar stopT, Mode mode) {
diff --git a/src/effects/SkXfermodeImageFilter.cpp b/src/effects/SkXfermodeImageFilter.cpp
index 0aa33d9cc0..45b5b427f2 100644
--- a/src/effects/SkXfermodeImageFilter.cpp
+++ b/src/effects/SkXfermodeImageFilter.cpp
@@ -35,7 +35,6 @@ public:
     SkXfermodeImageFilter_Base(SkBlendMode mode, sk_sp<SkImageFilter> inputs[2],
                                const CropRect* cropRect);
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkXfermodeImageFilter_Base)
 
 protected:
@@ -250,22 +249,6 @@ void SkXfermodeImageFilter_Base::drawForeground(SkCanvas* canvas, SkSpecialImage
     canvas->drawPaint(paint);
 }
 
-void SkXfermodeImageFilter_Base::toString(SkString* str) const {
-    str->appendf("SkXfermodeImageFilter: (");
-    str->appendf("blendmode: (%d)", (int)fMode);
-    if (this->getInput(0)) {
-        str->appendf("foreground: (");
-        this->getInput(0)->toString(str);
-        str->appendf(")");
-    }
-    if (this->getInput(1)) {
-        str->appendf("background: (");
-        this->getInput(1)->toString(str);
-        str->appendf(")");
-    }
-    str->append(")");
-}
-
 #if SK_SUPPORT_GPU
 
 #include "effects/GrXfermodeFragmentProcessor.h"
diff --git a/src/gpu/GrTestUtils.h b/src/gpu/GrTestUtils.h
index 0cfe6e45a3..7627df4b19 100644
--- a/src/gpu/GrTestUtils.h
+++ b/src/gpu/GrTestUtils.h
@@ -74,7 +74,6 @@ public:
     bool filterPath(SkPath* dst, const SkPath&, SkStrokeRec* , const SkRect*) const override;
     DashType asADash(DashInfo* info) const override;
     Factory getFactory() const override { return nullptr; }
-    void toString(SkString*) const override {}
 
 private:
     TestDashPathEffect(const SkScalar* intervals, int count, SkScalar phase);
diff --git a/src/gpu/text/GrSDFMaskFilter.cpp b/src/gpu/text/GrSDFMaskFilter.cpp
index ff79cdb3f0..82adaaa4ac 100644
--- a/src/gpu/text/GrSDFMaskFilter.cpp
+++ b/src/gpu/text/GrSDFMaskFilter.cpp
@@ -26,7 +26,6 @@ public:
 
     void computeFastBounds(const SkRect&, SkRect*) const override;
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(GrSDFMaskFilterImpl)
 
 protected:
@@ -87,10 +86,6 @@ sk_sp<SkFlattenable> GrSDFMaskFilterImpl::CreateProc(SkReadBuffer& buffer) {
     return GrSDFMaskFilter::Make();
 }
 
-void GrSDFMaskFilterImpl::toString(SkString* str) const {
-    str->append("GrSDFMaskFilterImpl: ()");
-}
-
 void gr_register_sdf_maskfilter_createproc() {
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(GrSDFMaskFilterImpl)
 }
diff --git a/src/image/SkImage.cpp b/src/image/SkImage.cpp
index cc4419a904..1d5e2dbf27 100644
--- a/src/image/SkImage.cpp
+++ b/src/image/SkImage.cpp
@@ -132,12 +132,6 @@ sk_sp<SkImage> SkImage::MakeFromEncoded(sk_sp<SkData> encoded, const SkIRect* su
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
-const char* SkImage::toString(SkString* str) const {
-    str->appendf("image: (id:%d (%d, %d) %s)", this->uniqueID(), this->width(), this->height(),
-                 this->isOpaque() ? "opaque" : "");
-    return str->c_str();
-}
-
 sk_sp<SkImage> SkImage::makeSubset(const SkIRect& subset) const {
     if (subset.isEmpty()) {
         return nullptr;
diff --git a/src/shaders/SkColorFilterShader.cpp b/src/shaders/SkColorFilterShader.cpp
index 0f25518669..16bf56522c 100644
--- a/src/shaders/SkColorFilterShader.cpp
+++ b/src/shaders/SkColorFilterShader.cpp
@@ -71,19 +71,6 @@ std::unique_ptr<GrFragmentProcessor> SkColorFilterShader::asFragmentProcessor(
 }
 #endif
 
-void SkColorFilterShader::toString(SkString* str) const {
-    str->append("SkColorFilterShader: (");
-
-    str->append("Shader: ");
-    as_SB(fShader)->toString(str);
-    str->append(" Filter: ");
-    // TODO: add "fFilter->toString(str);" once SkColorFilter::toString is added
-
-    this->INHERITED::toString(str);
-
-    str->append(")");
-}
-
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 sk_sp<SkShader> SkShader::makeWithColorFilter(sk_sp<SkColorFilter> filter) const {
diff --git a/src/shaders/SkColorFilterShader.h b/src/shaders/SkColorFilterShader.h
index 2f5b4693ee..d97dd063a5 100644
--- a/src/shaders/SkColorFilterShader.h
+++ b/src/shaders/SkColorFilterShader.h
@@ -21,7 +21,6 @@ public:
     std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs&) const override;
 #endif
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkColorFilterShader)
 
 protected:
diff --git a/src/shaders/SkColorShader.cpp b/src/shaders/SkColorShader.cpp
index 152a0b5529..c3f86b9cfb 100644
--- a/src/shaders/SkColorShader.cpp
+++ b/src/shaders/SkColorShader.cpp
@@ -97,17 +97,6 @@ std::unique_ptr<GrFragmentProcessor> SkColorShader::asFragmentProcessor(
 
 #endif
 
-void SkColorShader::toString(SkString* str) const {
-    str->append("SkColorShader: (");
-
-    str->append("Color: ");
-    str->appendHex(fColor);
-
-    this->INHERITED::toString(str);
-
-    str->append(")");
-}
-
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
@@ -223,16 +212,6 @@ std::unique_ptr<GrFragmentProcessor> SkColor4Shader::asFragmentProcessor(
 
 #endif
 
-void SkColor4Shader::toString(SkString* str) const {
-    str->append("SkColor4Shader: (");
-
-    str->append("RGBA:");
-    for (int i = 0; i < 4; ++i) {
-        str->appendf(" %g", fColor4.vec()[i]);
-    }
-    str->append(" )");
-}
-
 sk_sp<SkShader> SkColor4Shader::onMakeColorSpace(SkColorSpaceXformer* xformer) const {
     return SkShader::MakeColorShader(xformer->apply(fCachedByteColor));
 }
diff --git a/src/shaders/SkColorShader.h b/src/shaders/SkColorShader.h
index 9fab094996..235f8e330a 100644
--- a/src/shaders/SkColorShader.h
+++ b/src/shaders/SkColorShader.h
@@ -50,7 +50,6 @@ public:
     std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs&) const override;
 #endif
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkColorShader)
 
 protected:
@@ -106,7 +105,6 @@ public:
     std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs&) const override;
 #endif
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkColorShader)
 
 protected:
diff --git a/src/shaders/SkComposeShader.cpp b/src/shaders/SkComposeShader.cpp
index e7125ad966..845d320490 100644
--- a/src/shaders/SkComposeShader.cpp
+++ b/src/shaders/SkComposeShader.cpp
@@ -141,18 +141,3 @@ std::unique_ptr<GrFragmentProcessor> SkComposeShader::asFragmentProcessor(
                                                               std::move(fpA), fMode);
 }
 #endif
-
-void SkComposeShader::toString(SkString* str) const {
-    str->append("SkComposeShader: (");
-
-    str->append("dst: ");
-    as_SB(fDst)->toString(str);
-    str->append(" src: ");
-    as_SB(fSrc)->toString(str);
-    str->appendf(" mode: %s", SkBlendMode_Name(fMode));
-    str->appendf(" lerpT: %g", fLerpT);
-
-    this->INHERITED::toString(str);
-
-    str->append(")");
-}
diff --git a/src/shaders/SkComposeShader.h b/src/shaders/SkComposeShader.h
index 9208502613..c2dc2c3984 100644
--- a/src/shaders/SkComposeShader.h
+++ b/src/shaders/SkComposeShader.h
@@ -35,7 +35,6 @@ public:
     bool asACompose(ComposeRec* rec) const override;
 #endif
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkComposeShader)
 
 protected:
diff --git a/src/shaders/SkEmptyShader.h b/src/shaders/SkEmptyShader.h
index 12848b3738..7956003625 100644
--- a/src/shaders/SkEmptyShader.h
+++ b/src/shaders/SkEmptyShader.h
@@ -20,7 +20,6 @@ class SkEmptyShader : public SkShaderBase {
 public:
     SkEmptyShader() {}
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkEmptyShader)
 
 protected:
diff --git a/src/shaders/SkImageShader.cpp b/src/shaders/SkImageShader.cpp
index bd1b17f029..008ceda7b0 100644
--- a/src/shaders/SkImageShader.cpp
+++ b/src/shaders/SkImageShader.cpp
@@ -173,17 +173,6 @@ sk_sp<SkShader> SkImageShader::Make(sk_sp<SkImage> image,
     return sk_sp<SkShader>{ new SkImageShader(image, tx,ty, localMatrix, clampAsIfUnpremul) };
 }
 
-void SkImageShader::toString(SkString* str) const {
-    const char* gTileModeName[SkShader::kTileModeCount] = {
-        "clamp", "repeat", "mirror"
-    };
-
-    str->appendf("ImageShader: ((%s %s) ", gTileModeName[fTileModeX], gTileModeName[fTileModeY]);
-    fImage->toString(str);
-    this->INHERITED::toString(str);
-    str->append(")");
-}
-
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 #if SK_SUPPORT_GPU
diff --git a/src/shaders/SkImageShader.h b/src/shaders/SkImageShader.h
index 3e980d38f4..0d40c23ea4 100644
--- a/src/shaders/SkImageShader.h
+++ b/src/shaders/SkImageShader.h
@@ -23,7 +23,6 @@ public:
 
     bool isOpaque() const override;
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkImageShader)
 
 #if SK_SUPPORT_GPU
diff --git a/src/shaders/SkLocalMatrixShader.cpp b/src/shaders/SkLocalMatrixShader.cpp
index 509c66d43e..28d7775b27 100644
--- a/src/shaders/SkLocalMatrixShader.cpp
+++ b/src/shaders/SkLocalMatrixShader.cpp
@@ -71,16 +71,6 @@ bool SkLocalMatrixShader::onAppendStages(const StageRec& rec) const {
     return as_SB(fProxyShader)->appendStages(newRec);
 }
 
-void SkLocalMatrixShader::toString(SkString* str) const {
-    str->append("SkLocalMatrixShader: (");
-
-    as_SB(fProxyShader)->toString(str);
-
-    this->INHERITED::toString(str);
-
-    str->append(")");
-}
-
 sk_sp<SkShader> SkShader::makeWithLocalMatrix(const SkMatrix& localMatrix) const {
     if (localMatrix.isIdentity()) {
         return sk_ref_sp(const_cast<SkShader*>(this));
diff --git a/src/shaders/SkLocalMatrixShader.h b/src/shaders/SkLocalMatrixShader.h
index 48d1ef17a9..9f89812139 100644
--- a/src/shaders/SkLocalMatrixShader.h
+++ b/src/shaders/SkLocalMatrixShader.h
@@ -38,7 +38,6 @@ public:
         return fProxyShader;
     }
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkLocalMatrixShader)
 
 protected:
diff --git a/src/shaders/SkPerlinNoiseShader.cpp b/src/shaders/SkPerlinNoiseShader.cpp
index d864e165e5..b3dc9d428f 100644
--- a/src/shaders/SkPerlinNoiseShader.cpp
+++ b/src/shaders/SkPerlinNoiseShader.cpp
@@ -364,7 +364,6 @@ public:
     std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs&) const override;
 #endif
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPerlinNoiseShaderImpl)
 
 protected:
@@ -1477,37 +1476,6 @@ std::unique_ptr<GrFragmentProcessor> SkPerlinNoiseShaderImpl::asFragmentProcesso
 
 #endif
 
-void SkPerlinNoiseShaderImpl::toString(SkString* str) const {
-    str->append("SkPerlinNoiseShaderImpl: (");
-
-    str->append("type: ");
-    switch (fType) {
-        case kFractalNoise_Type:
-            str->append("\"fractal noise\"");
-            break;
-        case kTurbulence_Type:
-            str->append("\"turbulence\"");
-            break;
-        default:
-            str->append("\"unknown\"");
-            break;
-    }
-    str->append(" base frequency: (");
-    str->appendScalar(fBaseFrequencyX);
-    str->append(", ");
-    str->appendScalar(fBaseFrequencyY);
-    str->append(") number of octaves: ");
-    str->appendS32(fNumOctaves);
-    str->append(" seed: ");
-    str->appendScalar(fSeed);
-    str->append(" stitch tiles: ");
-    str->append(fStitchTiles ? "true " : "false ");
-
-    this->INHERITED::toString(str);
-
-    str->append(")");
-}
-
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 static bool valid_input(SkScalar baseX, SkScalar baseY, int numOctaves, const SkISize* tileSize,
diff --git a/src/shaders/SkPictureShader.cpp b/src/shaders/SkPictureShader.cpp
index f958814ca1..576598bfe6 100644
--- a/src/shaders/SkPictureShader.cpp
+++ b/src/shaders/SkPictureShader.cpp
@@ -338,22 +338,6 @@ void SkPictureShader::PictureShaderContext::shadeSpan(int x, int y, SkPMColor ds
     fBitmapShaderContext->shadeSpan(x, y, dstC, count);
 }
 
-void SkPictureShader::toString(SkString* str) const {
-    static const char* gTileModeName[SkShader::kTileModeCount] = {
-        "clamp", "repeat", "mirror"
-    };
-
-    str->appendf("PictureShader: [%f:%f:%f:%f] ",
-                 fPicture->cullRect().fLeft,
-                 fPicture->cullRect().fTop,
-                 fPicture->cullRect().fRight,
-                 fPicture->cullRect().fBottom);
-
-    str->appendf("(%s, %s)", gTileModeName[fTmx], gTileModeName[fTmy]);
-
-    this->INHERITED::toString(str);
-}
-
 #if SK_SUPPORT_GPU
 std::unique_ptr<GrFragmentProcessor> SkPictureShader::asFragmentProcessor(
         const GrFPArgs& args) const {
diff --git a/src/shaders/SkPictureShader.h b/src/shaders/SkPictureShader.h
index 6e5201e8fb..25fe53feb5 100644
--- a/src/shaders/SkPictureShader.h
+++ b/src/shaders/SkPictureShader.h
@@ -28,7 +28,6 @@ public:
     static sk_sp<SkShader> Make(sk_sp<SkPicture>, TileMode, TileMode, const SkMatrix*,
                                 const SkRect*);
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPictureShader)
 
 #if SK_SUPPORT_GPU
diff --git a/src/shaders/SkShader.cpp b/src/shaders/SkShader.cpp
index f3ffd26ef4..a17cca191c 100644
--- a/src/shaders/SkShader.cpp
+++ b/src/shaders/SkShader.cpp
@@ -208,13 +208,6 @@ sk_sp<SkShader> SkShader::MakePictureShader(sk_sp<SkPicture> src, TileMode tmx,
     return SkPictureShader::Make(std::move(src), tmx, tmy, localMatrix, tile);
 }
 
-void SkShaderBase::toString(SkString* str) const {
-    if (!fLocalMatrix.isIdentity()) {
-        str->append(" ");
-        fLocalMatrix.toString(str);
-    }
-}
-
 bool SkShaderBase::appendStages(const StageRec& rec) const {
     return this->onAppendStages(rec);
 }
@@ -258,13 +251,3 @@ bool SkShaderBase::onAppendStages(const StageRec& rec) const {
 sk_sp<SkFlattenable> SkEmptyShader::CreateProc(SkReadBuffer&) {
     return SkShader::MakeEmptyShader();
 }
-
-#include "SkEmptyShader.h"
-
-void SkEmptyShader::toString(SkString* str) const {
-    str->append("SkEmptyShader: (");
-
-    this->INHERITED::toString(str);
-
-    str->append(")");
-}
diff --git a/src/shaders/SkShaderBase.h b/src/shaders/SkShaderBase.h
index 53ec0dc853..9cfca4c6ba 100644
--- a/src/shaders/SkShaderBase.h
+++ b/src/shaders/SkShaderBase.h
@@ -208,8 +208,6 @@ public:
         return nullptr;
     }
 
-    virtual void toString(SkString* str) const;
-
     SK_DEFINE_FLATTENABLE_TYPE(SkShaderBase)
     SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP()
 
diff --git a/src/shaders/gradients/SkGradientShader.cpp b/src/shaders/gradients/SkGradientShader.cpp
index a574b7d46d..692d793c6a 100644
--- a/src/shaders/gradients/SkGradientShader.cpp
+++ b/src/shaders/gradients/SkGradientShader.cpp
@@ -627,38 +627,6 @@ void SkGradientShaderBase::commonAsAGradient(GradientInfo* info) const {
     }
 }
 
-void SkGradientShaderBase::toString(SkString* str) const {
-
-    str->appendf("%d colors: ", fColorCount);
-
-    for (int i = 0; i < fColorCount; ++i) {
-        str->appendHex(this->getLegacyColor(i), 8);
-        if (i < fColorCount-1) {
-            str->append(", ");
-        }
-    }
-
-    if (fColorCount > 2) {
-        str->append(" points: (");
-        for (int i = 0; i < fColorCount; ++i) {
-            str->appendScalar(this->getPos(i));
-            if (i < fColorCount-1) {
-                str->append(", ");
-            }
-        }
-        str->append(")");
-    }
-
-    static const char* gTileModeName[SkShader::kTileModeCount] = {
-        "clamp", "repeat", "mirror", "decal",
-    };
-
-    str->append(" ");
-    str->append(gTileModeName[fTileMode]);
-
-    this->INHERITED::toString(str);
-}
-
 ///////////////////////////////////////////////////////////////////////////////
 ///////////////////////////////////////////////////////////////////////////////
 
diff --git a/src/shaders/gradients/SkGradientShaderPriv.h b/src/shaders/gradients/SkGradientShaderPriv.h
index dccb4e70cb..e50f1a69e4 100644
--- a/src/shaders/gradients/SkGradientShaderPriv.h
+++ b/src/shaders/gradients/SkGradientShaderPriv.h
@@ -80,7 +80,6 @@ protected:
 
     SkGradientShaderBase(SkReadBuffer& );
     void flatten(SkWriteBuffer&) const override;
-    void toString(SkString* str) const override;
 
     void commonAsAGradient(GradientInfo*) const;
 
diff --git a/src/shaders/gradients/SkLinearGradient.cpp b/src/shaders/gradients/SkLinearGradient.cpp
index a377442dc4..34cac269f5 100644
--- a/src/shaders/gradients/SkLinearGradient.cpp
+++ b/src/shaders/gradients/SkLinearGradient.cpp
@@ -207,14 +207,4 @@ std::unique_ptr<GrFragmentProcessor> SkLinearGradient::asFragmentProcessor(
 
 #endif
 
-void SkLinearGradient::toString(SkString* str) const {
-    str->append("SkLinearGradient (");
-
-    str->appendf("start: (%f, %f)", fStart.fX, fStart.fY);
-    str->appendf(" end: (%f, %f) ", fEnd.fX, fEnd.fY);
-
-    this->INHERITED::toString(str);
-
-    str->append(")");
-}
 
diff --git a/src/shaders/gradients/SkLinearGradient.h b/src/shaders/gradients/SkLinearGradient.h
index 111ed99744..d100a1cf30 100644
--- a/src/shaders/gradients/SkLinearGradient.h
+++ b/src/shaders/gradients/SkLinearGradient.h
@@ -19,7 +19,6 @@ public:
     std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs&) const override;
 #endif
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkLinearGradient)
 
 protected:
diff --git a/src/shaders/gradients/SkRadialGradient.cpp b/src/shaders/gradients/SkRadialGradient.cpp
index 6d193615a4..ec0f8a0f95 100644
--- a/src/shaders/gradients/SkRadialGradient.cpp
+++ b/src/shaders/gradients/SkRadialGradient.cpp
@@ -185,19 +185,3 @@ void SkRadialGradient::appendGradientStages(SkArenaAlloc*, SkRasterPipeline* p,
                                             SkRasterPipeline*) const {
     p->append(SkRasterPipeline::xy_to_radius);
 }
-
-void SkRadialGradient::toString(SkString* str) const {
-    str->append("SkRadialGradient: (");
-
-    str->append("center: (");
-    str->appendScalar(fCenter.fX);
-    str->append(", ");
-    str->appendScalar(fCenter.fY);
-    str->append(") radius: ");
-    str->appendScalar(fRadius);
-    str->append(" ");
-
-    this->INHERITED::toString(str);
-
-    str->append(")");
-}
diff --git a/src/shaders/gradients/SkRadialGradient.h b/src/shaders/gradients/SkRadialGradient.h
index b0d6854221..d6963f6971 100644
--- a/src/shaders/gradients/SkRadialGradient.h
+++ b/src/shaders/gradients/SkRadialGradient.h
@@ -19,7 +19,6 @@ public:
     std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs&) const override;
 #endif
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkRadialGradient)
 
 protected:
diff --git a/src/shaders/gradients/SkSweepGradient.cpp b/src/shaders/gradients/SkSweepGradient.cpp
index c409d9a4e1..cfce5fe025 100644
--- a/src/shaders/gradients/SkSweepGradient.cpp
+++ b/src/shaders/gradients/SkSweepGradient.cpp
@@ -241,20 +241,6 @@ sk_sp<SkShader> SkSweepGradient::onMakeColorSpace(SkColorSpaceXformer* xformer)
                                        fGradFlags, &this->getLocalMatrix());
 }
 
-void SkSweepGradient::toString(SkString* str) const {
-    str->append("SkSweepGradient: (");
-
-    str->append("center: (");
-    str->appendScalar(fCenter.fX);
-    str->append(", ");
-    str->appendScalar(fCenter.fY);
-    str->append(") ");
-
-    this->INHERITED::toString(str);
-
-    str->append(")");
-}
-
 void SkSweepGradient::appendGradientStages(SkArenaAlloc* alloc, SkRasterPipeline* p,
                                            SkRasterPipeline*) const {
     p->append(SkRasterPipeline::xy_to_unit_angle);
diff --git a/src/shaders/gradients/SkSweepGradient.h b/src/shaders/gradients/SkSweepGradient.h
index dce9a3561b..a58c95752d 100644
--- a/src/shaders/gradients/SkSweepGradient.h
+++ b/src/shaders/gradients/SkSweepGradient.h
@@ -20,7 +20,6 @@ public:
     std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs&) const override;
 #endif
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkSweepGradient)
 
 protected:
diff --git a/src/shaders/gradients/SkTwoPointConicalGradient.cpp b/src/shaders/gradients/SkTwoPointConicalGradient.cpp
index 73ec3f213b..7d5026bc22 100644
--- a/src/shaders/gradients/SkTwoPointConicalGradient.cpp
+++ b/src/shaders/gradients/SkTwoPointConicalGradient.cpp
@@ -199,31 +199,6 @@ sk_sp<SkShader> SkTwoPointConicalGradient::onMakeColorSpace(SkColorSpaceXformer*
                                                  fTileMode, fGradFlags, &this->getLocalMatrix());
 }
 
-
-void SkTwoPointConicalGradient::toString(SkString* str) const {
-    str->append("SkTwoPointConicalGradient: (");
-
-    str->append("center1: (");
-    str->appendScalar(fCenter1.fX);
-    str->append(", ");
-    str->appendScalar(fCenter1.fY);
-    str->append(") radius1: ");
-    str->appendScalar(fRadius1);
-    str->append(" ");
-
-    str->append("center2: (");
-    str->appendScalar(fCenter2.fX);
-    str->append(", ");
-    str->appendScalar(fCenter2.fY);
-    str->append(") radius2: ");
-    str->appendScalar(fRadius2);
-    str->append(" ");
-
-    this->INHERITED::toString(str);
-
-    str->append(")");
-}
-
 void SkTwoPointConicalGradient::appendGradientStages(SkArenaAlloc* alloc, SkRasterPipeline* p,
                                                      SkRasterPipeline* postPipeline) const {
     const auto dRadius = fRadius2 - fRadius1;
diff --git a/src/shaders/gradients/SkTwoPointConicalGradient.h b/src/shaders/gradients/SkTwoPointConicalGradient.h
index f0d341f17c..b965e15038 100644
--- a/src/shaders/gradients/SkTwoPointConicalGradient.h
+++ b/src/shaders/gradients/SkTwoPointConicalGradient.h
@@ -65,7 +65,6 @@ public:
     const SkMatrix& getGradientMatrix() const { return fPtsToUnit; }
     const FocalData& getFocalData() const { return fFocalData; }
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkTwoPointConicalGradient)
 
 protected:
diff --git a/src/utils/SkShadowUtils.cpp b/src/utils/SkShadowUtils.cpp
index dfd5ba4886..f0b1e8f4d7 100644
--- a/src/utils/SkShadowUtils.cpp
+++ b/src/utils/SkShadowUtils.cpp
@@ -45,7 +45,6 @@ public:
             GrContext*, const GrColorSpaceInfo&) const override;
 #endif
 
-    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkGaussianColorFilter)
 
 protected:
@@ -64,10 +63,6 @@ sk_sp<SkFlattenable> SkGaussianColorFilter::CreateProc(SkReadBuffer&) {
     return Make();
 }
 
-void SkGaussianColorFilter::toString(SkString* str) const {
-    str->append("SkGaussianColorFilter ");
-}
-
 #if SK_SUPPORT_GPU
 
 std::unique_ptr<GrFragmentProcessor> SkGaussianColorFilter::asFragmentProcessor(