Use SkImage snapshots for ImageBufferSurface texture access

Source/platform/graphics/Canvas2DLayerBridgeTest.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 107 matching lines @@
         OwnPtr<SkDeferredCanvas> canvas = adoptPtr(SkDeferredCanvas::Create(surface.get()));
 
         ::testing::Mock::VerifyAndClearExpectations(&mainMock);
 
         {
             Canvas2DLayerBridgePtr bridge(adoptRef(new Canvas2DLayerBridge(mainMockProvider.release(), canvas.release(), surface, 0, NonOpaque)));
 
             ::testing::Mock::VerifyAndClearExpectations(&mainMock);
 
             EXPECT_CALL(mainMock, flush());
-            unsigned textureId = bridge->getBackingTexture();
+            unsigned textureId = bridge->getBackingTextureImage()->getTextureHandle(true);
             EXPECT_EQ(textureId, 0u);
 
             ::testing::Mock::VerifyAndClearExpectations(&mainMock);
         } // bridge goes out of scope here
 
         ::testing::Mock::VerifyAndClearExpectations(&mainMock);
     }
 
     void noDrawOnContextLostTest()
     {
@@ skipping 91 matching lines @@
 {
     prepareMailboxWithBitmapTest();
 }
 
 TEST_F(Canvas2DLayerBridgeTest, testPrepareMailboxAndLoseResource)
 {
     prepareMailboxAndLoseResourceTest();
 }
 
 } // namespace blink