IDL: Add [Custom=CallEpilogue] to eliminate CG special cases

Source/bindings/core/v8/custom/V8EventTargetCustom.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 33 matching lines @@
     // FIXME: This naming seems broken.
     if (impl->interfaceName() == EventTargetNames::LocalDOMWindow)
         return toV8(static_cast<DOMWindow*>(impl), creationContext, isolate);
 
     v8::Handle<v8::Value> wrapper = DOMDataStore::getWrapper(impl, isolate);
     if (!wrapper.IsEmpty())
         return wrapper;
     return impl->wrap(creationContext, isolate);
 }
 
+void V8EventTarget::addEventListenerMethodEpilogueCustom(const v8::FunctionCallbackInfo<v8::Value>& info, EventTarget* impl)
+{
+    if (info.Length() >= 2 && info[1]->IsObject() && !impl->toNode())
+        addHiddenValueToArray(info.GetIsolate(), info.Holder(), info[1], V8EventTarget::eventListenerCacheIndex);
+}
+
+void V8EventTarget::removeEventListenerMethodEpilogueCustom(const v8::FunctionCallbackInfo<v8::Value>& info, EventTarget* impl)
+{
+    if (info.Length() >= 2 && info[1]->IsObject() && !impl->toNode())
+        removeHiddenValueFromArray(info.GetIsolate(), info.Holder(), info[1], V8EventTarget::eventListenerCacheIndex);
+}
+
 } // namespace blink