Reland change to enable deferred image decoding for animated GIFs

Source/core/platform/graphics/chromium/test/MockImageDecoder.h

 /*
  * 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 17 matching lines @@
 #include "core/platform/image-decoders/ImageDecoder.h"
 #include "wtf/PassOwnPtr.h"
 
 namespace WebCore {
 
 class MockImageDecoderClient {
 public:
     virtual void decoderBeingDestroyed() = 0;
     virtual void frameBufferRequested() = 0;
     virtual ImageFrame::FrameStatus frameStatus() = 0;
+    virtual size_t frameCount() = 0;
+    virtual int repetitionCount() const = 0;
+    virtual float frameDuration() const = 0;
 };
 
 class MockImageDecoder : public ImageDecoder {
 public:
     static PassOwnPtr<MockImageDecoder> create(MockImageDecoderClient* client) { return adoptPtr(new MockImageDecoder(client)); }
 
     MockImageDecoder(MockImageDecoderClient* client)
         : ImageDecoder(ImageSource::AlphaPremultiplied, ImageSource::GammaAndColorProfileApplied)
-        , m_frameBufferRequestCount(0)
         , m_client(client)
     { }
 
     ~MockImageDecoder()
     {
         m_client->decoderBeingDestroyed();
     }
 
     virtual bool setSize(unsigned width, unsigned height)
     {
         ImageDecoder::setSize(width, height);
         m_frameBufferCache.resize(1);
         m_frameBufferCache[0].setSize(width, height);
         return true;
     }
 
     virtual void setFrameHasAlpha(bool hasAlpha) { m_frameBufferCache[0].setHasAlpha(hasAlpha); }
 
     virtual String filenameExtension() const
     {
         return "mock";
     }
 
+    virtual size_t frameCount()
+    {
+        return m_client->frameCount();
+    }
+
+    virtual int repetitionCount() const
+    {
+        return m_client->repetitionCount();
+    }
+
     virtual ImageFrame* frameBufferAtIndex(size_t)
     {
-        ++m_frameBufferRequestCount;
         m_client->frameBufferRequested();
 
         m_frameBufferCache[0].setStatus(m_client->frameStatus());
         return &m_frameBufferCache[0];
     }
 
-    int frameBufferRequestCount() const { return m_frameBufferRequestCount; }
+    virtual bool frameIsCompleteAtIndex(size_t) const
+    {
+        return m_client->frameStatus() == ImageFrame::FrameComplete;
+    }
+
+    virtual float frameDurationAtIndex(size_t) const
+    {
+        return m_client->frameDuration();
+    }
 
 private:
-    int m_frameBufferRequestCount;
     MockImageDecoderClient* m_client;
 };
 
 } // namespace WebCore
 
 #endif // MockImageDecoder_h