Fix bug, always keep fIsScaleTranslate in correct state

src/core/SkCanvas.cpp

 /*
  * Copyright 2008 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmapDevice.h"
 #include "SkCanvas.h"
 #include "SkCanvasPriv.h"
@@ skipping 1470 matching lines @@
     this->checkForDeferredSave();
     fDeviceCMDirty = true;
     fMCRec->fMatrix.preConcat(matrix);
     fIsScaleTranslate = fMCRec->fMatrix.isScaleTranslate();
     this->didConcat(matrix);
 }
 
 void SkCanvas::internalSetMatrix(const SkMatrix& matrix) {
     fDeviceCMDirty = true;
     fMCRec->fMatrix = matrix;
+    fIsScaleTranslate = matrix.isScaleTranslate();
 }
 
 void SkCanvas::setMatrix(const SkMatrix& matrix) {
     this->checkForDeferredSave();
     this->internalSetMatrix(matrix);
-    fIsScaleTranslate = matrix.isScaleTranslate();
     this->didSetMatrix(matrix);
 }
 
 void SkCanvas::resetMatrix() {
     this->setMatrix(SkMatrix::I());
 }
 
 #ifdef SK_EXPERIMENTAL_SHADOWING
 void SkCanvas::translateZ(SkScalar z) {
     this->checkForDeferredSave();
@@ skipping 1851 matching lines @@
 
 SkAutoCanvasMatrixPaint::~SkAutoCanvasMatrixPaint() {
     fCanvas->restoreToCount(fSaveCount);
 }
 
 #ifdef SK_SUPPORT_LEGACY_NEW_SURFACE_API
 SkSurface* SkCanvas::newSurface(const SkImageInfo& info, const SkSurfaceProps* props) {
     return this->makeSurface(info, props).release();
 }
 #endif