Deferred image decoding to support animated GIFs

Source/core/platform/graphics/chromium/ImageFrameGeneratorTest.cpp

 /*
  * Copyright (C) 2012 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
@@ skipping 77 matching lines @@
     virtual void frameBufferRequested()
     {
         ++m_frameBufferRequestCount;
     }
 
     virtual ImageFrame::FrameStatus frameStatus()
     {
         return m_frameStatus;
     }
 
+    virtual size_t frameCount() { return 1; }
+    virtual int repetitionCount() const { return cAnimationNone; }
+    virtual float frameDuration() const { return 0; }
+
 protected:
     PassOwnPtr<ScaledImageFragment> createCompleteImage(const SkISize& size)
     {
         SkBitmap bitmap;
         bitmap.setConfig(SkBitmap::kARGB_8888_Config, size.width(), size.height());
         bitmap.allocPixels();
         return ScaledImageFragment::createComplete(size, 0, bitmap);
     }
 
     void addNewData()
@@ skipping 274 matching lines @@
 
     ImageDecoder* tempDecoder = 0;
     EXPECT_TRUE(ImageDecodingStore::instance()->lockDecoder(m_generator.get(), fullSize(), &tempDecoder));
     ASSERT_TRUE(tempDecoder);
     EXPECT_NE(tempDecoder->frameBufferAtIndex(0)->getSkBitmap().getPixels(), tempImage->bitmap().getPixels());
     ImageDecodingStore::instance()->unlockCache(m_generator.get(), tempImage);
     ImageDecodingStore::instance()->unlockDecoder(m_generator.get(), tempDecoder);
 }
 
 } // namespace