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

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

Index: Source/bindings/core/v8/custom/V8EventTargetCustom.cpp
diff --git a/Source/bindings/core/v8/custom/V8EventTargetCustom.cpp b/Source/bindings/core/v8/custom/V8EventTargetCustom.cpp
index e98351f7bd14df377c773619ec14b481f75ce069..11347467a5a919ebc26777261f11da52239ef781 100644
--- a/Source/bindings/core/v8/custom/V8EventTargetCustom.cpp
+++ b/Source/bindings/core/v8/custom/V8EventTargetCustom.cpp
@@ -51,4 +51,16 @@ v8::Handle<v8::Value> toV8(EventTarget* impl, v8::Handle<v8::Object> creationCon
     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