Remove calls to HandleScope default ctor.

Source/bindings/v8/V8WorkerGlobalScopeEventListener.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009 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 40 matching lines @@
 
 void V8WorkerGlobalScopeEventListener::handleEvent(ScriptExecutionContext* context, Event* event)
 {
     if (!context)
         return;
 
     // The callback function on XMLHttpRequest can clear the event listener and destroys 'this' object. Keep a local reference to it.
     // See issue 889829.
     RefPtr<V8AbstractEventListener> protect(this);
 
-    v8::HandleScope handleScope;
+    v8::Isolate* isolate = getIsolateFromScriptExecutionContext(context);
+    v8::HandleScope handleScope(isolate);
 
     WorkerScriptController* script = toWorkerGlobalScope(context)->script();
     if (!script)
         return;
 
     v8::Handle<v8::Context> v8Context = script->context();
     if (v8Context.IsEmpty())
         return;
 
     // Enter the V8 context in which to perform the event handling.
     v8::Context::Scope scope(v8Context);
 
     // Get the V8 wrapper for the event object.
-    v8::Isolate* isolate = v8Context->GetIsolate();
     v8::Handle<v8::Value> jsEvent = toV8(event, v8::Handle<v8::Object>(), isolate);
 
     invokeEventHandler(context, event, v8::Local<v8::Value>::New(isolate, jsEvent));
 }
 
 v8::Local<v8::Value> V8WorkerGlobalScopeEventListener::callListenerFunction(ScriptExecutionContext* context, v8::Handle<v8::Value> jsEvent, Event* event)
 {
     v8::Local<v8::Function> handlerFunction = getListenerFunction(context);
     v8::Local<v8::Object> receiver = getReceiverObject(context, event);
     if (handlerFunction.IsEmpty() || receiver.IsEmpty())
@@ skipping 27 matching lines @@
         return listener;
 
     EventTarget* target = event->currentTarget();
     v8::Handle<v8::Value> value = toV8(target, v8::Handle<v8::Object>(), toV8Context(context, world())->GetIsolate());
     if (value.IsEmpty())
         return v8::Local<v8::Object>();
     return v8::Local<v8::Object>::New(v8::Handle<v8::Object>::Cast(value));
 }
 
 } // namespace WebCore