Revert "Reland "remove toString""

This reverts commit 92e37b6d79f12ccfaaf7671413316952d182267d.

Reason for revert: toString still used by flutter

Original change's description:
> 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>

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

Change-Id: Iafc59ffc1b3db67c520ba31bf12d68e1b46c0ea2
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 830651
Reviewed-on: https://skia-review.googlesource.com/131082
Reviewed-by: Cary Clark <caryclark@google.com>
Commit-Queue: Cary Clark <caryclark@google.com>

1 files changed, 56 insertions, 0 deletions

diff --git a/src/effects/SkLayerDrawLooper.cpp b/src/effects/SkLayerDrawLooper.cpp
index 1610809456..db61e08c4f 100644
--- a/src/effects/SkLayerDrawLooper.cpp
+++ b/src/effects/SkLayerDrawLooper.cpp
@@ -279,6 +279,62 @@ 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),