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, 17 insertions, 0 deletions

diff --git a/src/shaders/SkShader.cpp b/src/shaders/SkShader.cpp
index a17cca191c..f3ffd26ef4 100644
--- a/src/shaders/SkShader.cpp
+++ b/src/shaders/SkShader.cpp
@@ -208,6 +208,13 @@ 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);
 }
@@ -251,3 +258,13 @@ 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(")");
+}