ScriptState::contextIsEmpty shouldn't return true for a context whose global object is detached

Source/bindings/core/v8/WindowProxy.cpp

 /*
  * Copyright (C) 2008, 2009, 2011 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 79 matching lines @@
 void WindowProxy::disposeContext(GlobalDetachmentBehavior behavior)
 {
     if (!isContextInitialized())
         return;
 
     v8::HandleScope handleScope(m_isolate);
     v8::Handle<v8::Context> context = m_scriptState->context();
     m_frame->loader().client()->willReleaseScriptContext(context, m_world->worldId());
 
     if (behavior == DetachGlobal)
-        context->DetachGlobal();
+        m_scriptState->detachGlobalObject();
 
     m_scriptState->disposePerContextData();
 
     // It's likely that disposing the context has created a lot of
     // garbage. Notify V8 about this so it'll have a chance of cleaning
     // it up when idle.
     V8GCForContextDispose::instanceTemplate().notifyContextDisposed(m_frame->isMainFrame());
 }
 
 void WindowProxy::clearForClose()
@@ skipping 373 matching lines @@
 
 void WindowProxy::updateSecurityOrigin(SecurityOrigin* origin)
 {
     ASSERT(m_world->isMainWorld());
     if (!isContextInitialized())
         return;
     setSecurityToken(origin);
 }
 
 } // namespace blink