[bindings] Allow dictionary and union types to be returned from static methods.

third_party/WebKit/Source/bindings/templates/dictionary_v8.h.tmpl

 {% filter format_blink_cpp_source_code %}
 
 {% include 'copyright_block.txt' %}
 #ifndef {{v8_original_class}}_h
 #define {{v8_original_class}}_h
 
 {% for filename in header_includes %}
 #include "{{filename}}"
 {% endfor %}
 
 namespace blink {
 
 class ExceptionState;
 
 class {{v8_class}} {
  public:
   {{exported}}static void toImpl(v8::Isolate*, v8::Local<v8::Value>, {{cpp_class}}&, ExceptionState&);
 };
 
 {{exported}}bool toV8{{cpp_class}}(const {{cpp_class}}&, v8::Local<v8::Object> dictionary, v8::Local<v8::Object> creationContext, v8::Isolate*);
 
-template<class CallbackInfo>
+template <class CallbackInfo>
 inline void v8SetReturnValue(const CallbackInfo& callbackInfo, {{cpp_class}}& impl) {
   v8SetReturnValue(callbackInfo, ToV8(impl, callbackInfo.Holder(), callbackInfo.GetIsolate()));
 }
 
+template <class CallbackInfo>
+inline void v8SetReturnValue(const CallbackInfo& callbackInfo, {{cpp_class}}& impl, v8::Local<v8::Object> creationContext) {
+  v8SetReturnValue(callbackInfo, ToV8(impl, creationContext, callbackInfo.GetIsolate()));
+}
+
 template <>
 struct NativeValueTraits<{{cpp_class}}> {
   static {{cpp_class}} nativeValue(v8::Isolate*, v8::Local<v8::Value>, ExceptionState&);
 };
 
 template <>
 struct V8TypeOf<{{cpp_class}}> {
   typedef {{v8_class}} Type;
 };
 
 }  // namespace blink
 
 #endif  // {{v8_original_class}}_h
 
 {% endfilter %}{# format_blink_cpp_source_code #}