Inherit EventTarget interface instead of duplicating its code

Source/bindings/v8/custom/V8AudioContextCustom.cpp

Index: Source/bindings/v8/custom/V8AudioContextCustom.cpp
diff --git a/Source/bindings/v8/custom/V8AudioContextCustom.cpp b/Source/bindings/v8/custom/V8AudioContextCustom.cpp
index 37accea659aa296ba796aa363f1c671cf08afaa0..b9c84ff905af9672235dc15b5e15b26a7b86c2e2 100644
--- a/Source/bindings/v8/custom/V8AudioContextCustom.cpp
+++ b/Source/bindings/v8/custom/V8AudioContextCustom.cpp
@@ -71,7 +71,7 @@ void V8AudioContext::constructorCustom(const v8::FunctionCallbackInfo<v8::Value>
     
     // Transform the holder into a wrapper object for the audio context.
     v8::Handle<v8::Object> wrapper = args.Holder();
-    V8DOMWrapper::associateObjectWithWrapper(audioContext.release(), &info, wrapper, args.GetIsolate(), WrapperConfiguration::Dependent);
+    V8DOMWrapper::associateObjectWithWrapper<V8AudioContext>(audioContext.release(), &info, wrapper, args.GetIsolate(), WrapperConfiguration::Dependent);
     args.GetReturnValue().Set(wrapper);
 }