Remove eventTargetInheritance from WrapperTypeInfo

third_party/WebKit/Source/bindings/core/v8/V8Binding.cpp

Index: third_party/WebKit/Source/bindings/core/v8/V8Binding.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/V8Binding.cpp b/third_party/WebKit/Source/bindings/core/v8/V8Binding.cpp
index 8df616db64ac390ada680866c0801f65b3a9562d..e34a8b21e095d66fdae733400edb334962736de8 100644
--- a/third_party/WebKit/Source/bindings/core/v8/V8Binding.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/V8Binding.cpp
@@ -797,15 +797,7 @@ EventTarget* toEventTarget(v8::Isolate* isolate, v8::Local<v8::Value> value) {
   // exists on a prototype chain of v8Value.
   if (DOMWindow* window = toDOMWindow(isolate, value))

[Yuki, 2017/02/13 05:48:00]

I think we no longer need this hack.

https://crrev.com/2500363002 should have made the situation simpler, and now
(IIUC) you can simply apply HasInstance() API to the global proxy object, too. 
i.e. you can simply use V8EventTarget::toImpl(WithTypeCheck) for window, too.

     return window;
-  if (V8EventTarget::hasInstance(value, isolate)) {
-    v8::Local<v8::Object> object = v8::Local<v8::Object>::Cast(value);
-    const WrapperTypeInfo* wrapperTypeInfo = toWrapperTypeInfo(object);
-    if (wrapperTypeInfo->eventTargetInheritance ==
-        WrapperTypeInfo::NotInheritFromEventTarget)
-      return nullptr;
-    return static_cast<EventTarget*>(toScriptWrappable(object));
-  }
-  return nullptr;
+  return V8EventTarget::toImplWithTypeCheck(isolate, value);
 }
 
 void toFlexibleArrayBufferView(v8::Isolate* isolate,