reland hide get/setLocalMatrix

gm/perlinnoise.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gm.h"
 #include "SkPerlinNoiseShader.h"
 
@@ skipping 127 matching lines @@
         canvas->drawRect(r, paint);
         canvas->restore();
 
         // The next row should draw the same as the previous, even though we are using a local
         // matrix instead of the canvas.
 
         canvas->translate(0, h * 2 + 10);
 
         SkMatrix lm;
         lm.setScale(2, 2);
-        paint.getShader()->setLocalMatrix(lm);
+        paint.setShader(SkShader::CreateLocalMatrixShader(paint.getShader(), lm))->unref();
         r.fRight += r.width();
         r.fBottom += r.height();
 
         canvas->save();
         canvas->translate(0, h + 10);
         canvas->drawRect(r, paint);
         canvas->restore();
         
         canvas->save();
         canvas->translate(w + 100, h + 10);
         canvas->drawRect(r, paint);
         canvas->restore();
     }
     
 private:
     typedef GM INHERITED;
     SkISize fSize;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_GM( return new PerlinNoiseGM; )
 DEF_GM( return new PerlinNoiseGM2; )