WIP bindings: Add support for the record<K,V> WebIDL type.

third_party/WebKit/Source/bindings/core/v8/NativeValueTraits.h

Index: third_party/WebKit/Source/bindings/core/v8/NativeValueTraits.h
diff --git a/third_party/WebKit/Source/bindings/core/v8/NativeValueTraits.h b/third_party/WebKit/Source/bindings/core/v8/NativeValueTraits.h
index 3bc77e548afbe3d997b21bdb675e06fdf1f05fac..9f0005189b3cc1f5210bb6e0b49604cf2fef996b 100644
--- a/third_party/WebKit/Source/bindings/core/v8/NativeValueTraits.h
+++ b/third_party/WebKit/Source/bindings/core/v8/NativeValueTraits.h
@@ -15,10 +15,6 @@ class ExceptionState;
 template <typename T, typename... Arguments>
 struct NativeValueTraits {
   STATIC_ONLY(NativeValueTraits);
-  static T nativeValue(v8::Isolate*,

[Yuki, 2017/03/02 07:47:28]

If you'd like to remove this declaration, could you put a comment instead?

The empty struct seems meaningless.  It's unfriendly for code readers.

-                       v8::Local<v8::Value>,
-                       ExceptionState&,
-                       Arguments... args);
 };
 
 }  // namespace blink