[WIP] bindings: Introduce PropertyBag

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 d367d057041d281bbb10d9c668eeed5cdc151dbc..a3f0274327d16423d91ac54e3f8b182da9cbc6ae 100644
--- a/Source/core/animation/EffectInput.cpp
+++ b/Source/core/animation/EffectInput.cpp
@@ -58,11 +58,11 @@ PassRefPtrWillBeRawPtr<AnimationEffect> EffectInput::convert(Element* element, c
         RefPtrWillBeRawPtr<StringKeyframe> keyframe = StringKeyframe::create();
 
         ScriptValue scriptValue;
-        bool frameHasOffset = DictionaryHelper::get(keyframeDictionaryVector[i], "offset", scriptValue) && !scriptValue.isNull();
+        bool frameHasOffset = keyframeDictionaryVector[i].get("offset", scriptValue) && !scriptValue.isNull();
 
         if (frameHasOffset) {
             double offset;
-            DictionaryHelper::get(keyframeDictionaryVector[i], "offset", offset);
+            keyframeDictionaryVector[i].get("offset", offset);
 
             // Keyframes with offsets outside the range [0.0, 1.0] are an error.
             if (std::isnan(offset)) {
@@ -86,12 +86,12 @@ PassRefPtrWillBeRawPtr<AnimationEffect> EffectInput::convert(Element* element, c
         keyframes.append(keyframe);
 
         String compositeString;
-        DictionaryHelper::get(keyframeDictionaryVector[i], "composite", compositeString);
+        keyframeDictionaryVector[i].get("composite", compositeString);
         if (compositeString == "add")
             keyframe->setComposite(AnimationEffect::CompositeAdd);
 
         String timingFunctionString;
-        if (DictionaryHelper::get(keyframeDictionaryVector[i], "easing", timingFunctionString)) {
+        if (keyframeDictionaryVector[i].get("easing", timingFunctionString)) {
             if (RefPtrWillBeRawPtr<CSSValue> timingFunctionValue = BisonCSSParser::parseAnimationTimingFunctionValue(timingFunctionString))
                 keyframe->setEasing(CSSToStyleMap::mapAnimationTimingFunction(timingFunctionValue.get(), true));
         }
@@ -104,7 +104,7 @@ PassRefPtrWillBeRawPtr<AnimationEffect> EffectInput::convert(Element* element, c
             if (id == CSSPropertyInvalid)
                 continue;
             String value;
-            DictionaryHelper::get(keyframeDictionaryVector[i], property, value);
+            keyframeDictionaryVector[i].get(property, value);
             keyframe->setPropertyValue(id, value, styleSheetContents);
         }
     }