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

Source/bindings/core/v8/Dictionary.h

 /*
  * Copyright (C) 2010 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:
  *
  * 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 107 matching lines @@
             m_context.resetPerPropertyContext();
         }
     private:
         ConversionContext& m_context;
     };
 
     bool convert(ConversionContext&, const String&, Dictionary&) const;
 
     bool getOwnPropertiesAsStringHashMap(HashMap<String, String>&) const;
     bool getOwnPropertyNames(Vector<String>&) const;
+    bool getPropertyNames(Vector<String>&) const;
 
     bool getWithUndefinedOrNullCheck(const String&, String&) const;
     bool getWithUndefinedOrNullCheck(const String&, RefPtrWillBeMember<Element>&) const;
     bool getWithUndefinedOrNullCheck(const String&, RefPtrWillBeMember<Path2D>&) const;
 
     bool hasProperty(const String&) const;
 
     v8::Isolate* isolate() const { return m_isolate; }
 
     bool getKey(const String& key, v8::Local<v8::Value>&) const;
@@ skipping 34 matching lines @@
     static bool convert(const Dictionary&, Dictionary::ConversionContext&, const String& key, T& value);
     template <typename T>
     static bool convert(const Dictionary&, Dictionary::ConversionContext&, const String& key, Nullable<T>& value);
     template <template <typename> class PointerType, typename T>
     static bool convert(const Dictionary&, Dictionary::ConversionContext&, const String& key, PointerType<T>& value);
 };
 
 }
 
 #endif // Dictionary_h