Make length property return useful values for DOM bindings functions

Source/bindings/tests/results/V8TestCallback.cpp

 /*
     This file is part of the WebKit open source project.
     This file has been generated by generate-bindings.pl. DO NOT MODIFY!
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
 
     This library is distributed in the hope that it will be useful,
@@ skipping 20 matching lines @@
 #include <wtf/RefCounted.h>
 #include <wtf/RefPtr.h>
 
 #include <wtf/Assertions.h>
 
 namespace WebCore {
 
 V8TestCallback::V8TestCallback(v8::Handle<v8::Object> callback, ScriptExecutionContext* context)
     : ActiveDOMCallback(context)
     , m_callback(callback)
-    , m_world(context->isDocument() ? DOMWrapperWorld::isolatedWorld(v8::Context::GetCurrent()) : 0)
+    , m_world(DOMWrapperWorld::current(context))
 {
 }
 
 V8TestCallback::~V8TestCallback()
 {
 }
 
 // Functions
 
 bool V8TestCallback::callbackWithNoParam()
@@ skipping 130 matching lines @@
     v8::Handle<v8::Value> argv[] = {
         boolParamHandle
     };
 
     bool callbackReturnValue = false;
     return !invokeCallback(m_callback.get(), 1, argv, callbackReturnValue, scriptExecutionContext());
 }
 
 } // namespace WebCore