Add V8TypeOf<> for IDL dictionaries

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

Index: third_party/WebKit/Source/bindings/templates/dictionary_v8.h
diff --git a/third_party/WebKit/Source/bindings/templates/dictionary_v8.h b/third_party/WebKit/Source/bindings/templates/dictionary_v8.h
index 7eb47ade1796abfbfa12c189109df8774e2cdd85..e9bc6dc1681a4ae9230b71f78e6ca76dee3f106c 100644
--- a/third_party/WebKit/Source/bindings/templates/dictionary_v8.h
+++ b/third_party/WebKit/Source/bindings/templates/dictionary_v8.h
@@ -29,6 +29,11 @@ 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