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

Source/bindings/core/v8/Dictionary.cpp

 /*
  * 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 246 matching lines @@
         v8::Local<v8::String> key = properties->Get(i)->ToString();
         if (!options->Has(key))
             continue;
         TOSTRING_DEFAULT(V8StringResource<>, stringKey, key, false);
         names.append(stringKey);
     }
 
     return true;
 }
 
+bool Dictionary::getPropertyNames(Vector<String>& names) const
+{
+    if (!isObject())
+        return false;
+
+    v8::Handle<v8::Object> options = m_options->ToObject();
+    if (options.IsEmpty())
+        return false;
+
+    v8::Local<v8::Array> properties = options->GetPropertyNames();
+    if (properties.IsEmpty())
+        return true;
+    for (uint32_t i = 0; i < properties->Length(); ++i) {
+        v8::Local<v8::String> key = properties->Get(i)->ToString();
+        if (!options->Has(key))
+            continue;
+        TOSTRING_DEFAULT(V8StringResource<>, stringKey, key, false);
+        names.append(stringKey);
+    }
+
+    return true;
+}
+
 void Dictionary::ConversionContext::resetPerPropertyContext()
 {
     if (m_dirty) {
         m_dirty = false;
         m_isNullable = false;
         m_propertyTypeName = "";
     }
 }
 
 Dictionary::ConversionContext& Dictionary::ConversionContext::setConversionType(const String& typeName, bool isNullable)
 {
     ASSERT(!m_dirty);
     m_dirty = true;
     m_isNullable = isNullable;
     m_propertyTypeName = typeName;
 
     return *this;
 }
 
 void Dictionary::ConversionContext::throwTypeError(const String& detail)
 {
     exceptionState().throwTypeError(detail);
 }
 
 } // namespace blink