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>

1 files changed, 15 insertions, 0 deletions

diff --git a/src/core/SkColorFilter.cpp b/src/core/SkColorFilter.cpp
index 41ebb42669..5362c1aca7 100644
--- a/src/core/SkColorFilter.cpp
+++ b/src/core/SkColorFilter.cpp
@@ -98,6 +98,15 @@ 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;
@@ -216,6 +225,8 @@ public:
     }
 #endif
 
+    void toString(SkString* str) const override;
+
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkSRGBGammaColorFilter)
 
     void onAppendStages(SkRasterPipeline* p, SkColorSpace*, SkArenaAlloc* alloc,
@@ -256,6 +267,10 @@ 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);