Add getPropertyNames to v8 Dictionaries and make use of in Keyframes processing.

Source/core/animation/EffectInput.cpp

Index: Source/core/animation/EffectInput.cpp
diff --git a/Source/core/animation/EffectInput.cpp b/Source/core/animation/EffectInput.cpp
index d84fea6dc51998f7fc88a1816db5cdd57b78533e..3acee0e8b3c2f530f1e7f4432573eb03d4651700 100644
--- a/Source/core/animation/EffectInput.cpp
+++ b/Source/core/animation/EffectInput.cpp
@@ -95,7 +95,7 @@ PassRefPtrWillBeRawPtr<AnimationEffect> EffectInput::convert(Element* element, c
         }
 
         Vector<String> keyframeProperties;
-        keyframeDictionaryVector[i].getOwnPropertyNames(keyframeProperties);
+        keyframeDictionaryVector[i].getPropertyNames(keyframeProperties);
         for (size_t j = 0; j < keyframeProperties.size(); ++j) {
             String property = keyframeProperties[j];
             CSSPropertyID id = AnimationInputHelpers::keyframeAttributeToCSSPropertyID(property);