Unprefix -webkit-filter and add a pixel test for it.

sky/engine/platform/animation/KeyframeValueList.h

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. 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 22 matching lines @@
 #include "sky/engine/wtf/PassOwnPtr.h"
 #include "sky/engine/wtf/Vector.h"
 
 namespace blink {
 
 enum AnimatedPropertyID {
     AnimatedPropertyInvalid,
     AnimatedPropertyTransform,
     AnimatedPropertyOpacity,
     AnimatedPropertyBackgroundColor,
-    AnimatedPropertyWebkitFilter
+    AnimatedPropertyFilter
 };
 
 // Used to store a series of values in a keyframe list.
 // Values will all be of the same type, which can be inferred from the property.
 class PLATFORM_EXPORT KeyframeValueList {
 public:
     explicit KeyframeValueList(AnimatedPropertyID property)
         : m_property(property)
     {
     }
@@ skipping 27 matching lines @@
     void insert(PassOwnPtr<const AnimationValue>);
 
 protected:
     Vector<OwnPtr<const AnimationValue> > m_values;
     AnimatedPropertyID m_property;
 };
 
 } // namespace blink
 
 #endif  // SKY_ENGINE_PLATFORM_ANIMATION_KEYFRAMEVALUELIST_H_