Delete WorldContextHandle in favor of DOMWrapperWorld

Source/bindings/v8/V8MutationCallback.cpp

 /*
  * Copyright (C) 2013 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 26 matching lines @@
 
 template<>
 void WeakHandleListener<V8MutationCallback>::callback(v8::Isolate*, v8::Persistent<v8::Value>, V8MutationCallback* callback)
 {
     callback->m_callback.clear();
 }
 
 V8MutationCallback::V8MutationCallback(v8::Handle<v8::Function> callback, ScriptExecutionContext* context, v8::Handle<v8::Object> owner, v8::Isolate* isolate)
     : ActiveDOMCallback(context)
     , m_callback(callback)
-    , m_world(DOMWrapperWorld::current(context))
+    , m_world(DOMWrapperWorld::current())
 {
     owner->SetHiddenValue(V8HiddenPropertyName::callback(), callback);
     WeakHandleListener<V8MutationCallback>::makeWeak(isolate, m_callback.get(), this);
 }
 
 void V8MutationCallback::call(const Vector<RefPtr<MutationRecord> >& mutations, MutationObserver* observer)
 {
     if (!canInvokeCallback())
         return;
 
@@ skipping 20 matching lines @@
 
     v8::Handle<v8::Object> thisObject = v8::Handle<v8::Object>::Cast(observerHandle);
     v8::Handle<v8::Value> argv[] = { v8Array(mutations, isolate), observerHandle };
 
     v8::TryCatch exceptionCatcher;
     exceptionCatcher.SetVerbose(true);
     ScriptController::callFunctionWithInstrumentation(scriptExecutionContext(), callback, thisObject, 2, argv);
 }
 
 } // namespace WebCore