Expose setting API to set ImageAnimationPolicy(Allowed, Once, None)

Source/platform/graphics/BitmapImageTest.cpp

 /*
  * Copyright (c) 2013, 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 34 matching lines @@
 public:
     class FakeImageObserver : public ImageObserver {
     public:
         FakeImageObserver() : m_lastDecodedSizeChangedDelta(0) { }
 
         virtual void decodedSizeChanged(const Image*, int delta)
         {
             m_lastDecodedSizeChangedDelta = delta;
         }
         virtual void didDraw(const Image*) override { }
-        virtual bool shouldPauseAnimation(const Image*) override { return false; }
+        virtual bool shouldPauseAnimation(const Image*, bool repeated = false) override { return false; }
         virtual void animationAdvanced(const Image*) override { }
         virtual void changedInRect(const Image*, const IntRect&) { }
 
         int m_lastDecodedSizeChangedDelta;
     };
 
     static PassRefPtr<SharedBuffer> readFile(const char* fileName)
     {
         String filePath = Platform::current()->unitTestSupport()->webKitRootDir();
         filePath.append(fileName);
@@ skipping 172 matching lines @@
 TEST_F(BitmapImageTest, icoHasWrongFrameDimensions)
 {
     loadImage("/LayoutTests/fast/images/resources/wrong-frame-dimensions.ico");
     // This call would cause crash without fix for 408026
     imageForDefaultFrame();
 }
 
 #endif // USE(QCMSLIB)
 
 } // namespace blink