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

Source/bindings/core/v8/Dictionary.cpp

Index: Source/bindings/core/v8/Dictionary.cpp
diff --git a/Source/bindings/core/v8/Dictionary.cpp b/Source/bindings/core/v8/Dictionary.cpp
index 95e90911ddcdb7f0c8208f82b6f821f5aaf79a9e..ae523a4a0de41c747a6d442d6ce9af17441084f0 100644
--- a/Source/bindings/core/v8/Dictionary.cpp
+++ b/Source/bindings/core/v8/Dictionary.cpp
@@ -264,6 +264,29 @@ bool Dictionary::getOwnPropertyNames(Vector<String>& names) const
     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) {