Use SkShader's localMat for SkLocalMatrixShader.

src/core/SkLocalMatrixShader.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkLocalMatrixShader.h"
 
 SkLocalMatrixShader::SkLocalMatrixShader(SkReadBuffer& buffer) : INHERITED(buffer) {
-    buffer.readMatrix(&fProxyLocalMatrix);
+    if (buffer.isVersionLT(SkReadBuffer::kSimplifyLocalMatrix_Version)) {
+        buffer.readMatrix(&(INHERITED::fLocalMatrix));
+    }
     fProxyShader.reset(buffer.readShader());
     if (NULL == fProxyShader.get()) {
         sk_throw();
     }
 }
 
 void SkLocalMatrixShader::flatten(SkWriteBuffer& buffer) const {
     this->INHERITED::flatten(buffer);
-    buffer.writeMatrix(fProxyLocalMatrix);
     buffer.writeFlattenable(fProxyShader.get());
 }
 
 SkShader::Context* SkLocalMatrixShader::onCreateContext(const ContextRec& rec,
                                                         void* storage) const {
     ContextRec newRec(rec);
     SkMatrix tmp;
     if (rec.fLocalMatrix) {
-        tmp.setConcat(fProxyLocalMatrix, *rec.fLocalMatrix);
+        tmp.setConcat(this->getLocalMatrix(), *rec.fLocalMatrix);
         newRec.fLocalMatrix = &tmp;
     } else {
-        newRec.fLocalMatrix = &fProxyLocalMatrix;
+        newRec.fLocalMatrix = &this->getLocalMatrix();
     }
     return fProxyShader->createContext(newRec, storage);
 }
 
 #ifndef SK_IGNORE_TO_STRING
 void SkLocalMatrixShader::toString(SkString* str) const {
     str->append("SkLocalMatrixShader: (");
 
     fProxyShader->toString(str);
 
@@ skipping 13 matching lines @@
     SkMatrix otherLocalMatrix;
     SkAutoTUnref<SkShader> otherProxy(proxy->refAsALocalMatrixShader(&otherLocalMatrix));
     if (otherProxy.get()) {
         otherLocalMatrix.preConcat(localMatrix);
         lm = &otherLocalMatrix;
         proxy = otherProxy.get();
     }
 
     return SkNEW_ARGS(SkLocalMatrixShader, (proxy, *lm));
 }