[WIP] bindings: Introduce PropertyBag

Source/bindings/tests/results/V8TestObject.h

Index: Source/bindings/tests/results/V8TestObject.h
diff --git a/Source/bindings/tests/results/V8TestObject.h b/Source/bindings/tests/results/V8TestObject.h
index 761f90619e2f40f0a243aba56bc6e6ad00c43cc8..5a12688da7cbc646033ccd71303f7c2217f3c1de 100644
--- a/Source/bindings/tests/results/V8TestObject.h
+++ b/Source/bindings/tests/results/V8TestObject.h
@@ -7,6 +7,7 @@
 #ifndef V8TestObject_h
 #define V8TestObject_h
 
+#include "bindings/core/v8/PropertyBagTraits.h"
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "bindings/core/v8/V8Binding.h"
 #include "bindings/core/v8/V8DOMWrapper.h"
@@ -166,5 +167,10 @@ inline void v8SetReturnValueFast(const CallbackInfo& callbackInfo, PassRefPtr<Te
     v8SetReturnValueFast(callbackInfo, impl.get(), wrappable);
 }
 
+template <>
+struct PropertyBagTraits<TestObject> {
+    typedef V8TestObject type;
+};
+
 } // namespace blink
 #endif // V8TestObject_h