Revert of Web Animations API: Load resources referenced in element.animate()

Source/core/animation/AnimatableImage.h

 /*
  * 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 22 matching lines @@
 
 #include "core/animation/AnimatableValue.h"
 #include "core/css/CSSCrossfadeValue.h"
 #include "core/rendering/style/StyleImage.h"
 
 namespace WebCore {
 
 class AnimatableImage FINAL : public AnimatableValue {
 public:
     virtual ~AnimatableImage() { }
-    static PassRefPtr<AnimatableImage> create(PassRefPtr<CSSValue> value)
+    static PassRefPtr<AnimatableImage> create(StyleImage* image)
     {
-        return adoptRef(new AnimatableImage(value));
+        return adoptRef(new AnimatableImage(image));
     }
-    CSSValue* toCSSValue() const { return m_value.get(); }
+    PassRefPtrWillBeRawPtr<CSSValue> toCSSValue() const { return m_image->cssValue(); }
+    StyleImage* toStyleImage() const { return m_image.get(); }
 
 protected:
     virtual PassRefPtr<AnimatableValue> interpolateTo(const AnimatableValue*, double fraction) const OVERRIDE;
     virtual PassRefPtr<AnimatableValue> addWith(const AnimatableValue*) const OVERRIDE;
     virtual bool usesDefaultInterpolationWith(const AnimatableValue*) const OVERRIDE;
 
 private:
-    AnimatableImage(PassRefPtr<CSSValue> value)
-        : m_value(value)
+    AnimatableImage(StyleImage* image)
+        : m_image(image)
     {
-        ASSERT(m_value);
-        ASSERT(m_value->isImageValue() || m_value->isImageSetValue() || m_value->isGradientValue() || m_value->isCrossfadeValue() || m_value->isCursorImageValue());
+        ASSERT(m_image);
     }
     virtual AnimatableType type() const OVERRIDE { return TypeImage; }
     virtual bool equalTo(const AnimatableValue*) const OVERRIDE;
 
-    const RefPtr<CSSValue> m_value;
+    const RefPtr<StyleImage> m_image;
 };
 
 DEFINE_ANIMATABLE_VALUE_TYPE_CASTS(AnimatableImage, isImage());
 
 } // namespace WebCore
 
 #endif // AnimatableImage_h