Reland: Do not initialize v8::Context on |ScriptController::updateDocument|.

Source/bindings/v8/ScriptController.cpp

 /*
  * Copyright (C) 2008, 2009 Google Inc. All rights reserved.
  * Copyright (C) 2009 Apple 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.
@@ skipping 455 matching lines @@
     return V8PerContextDebugData::setContextDebugData(context, "page", debugId);
 }
 
 int ScriptController::contextDebugId(v8::Handle<v8::Context> context)
 {
     return V8PerContextDebugData::contextDebugId(context);
 }
 
 void ScriptController::updateDocument()
 {
-    // For an uninitialized main window shell, do not incur the cost of context initialization during FrameLoader::init().
-    if ((!m_windowShell->isContextInitialized() || !m_windowShell->isGlobalInitialized()) && m_frame->loader().stateMachine()->creatingInitialEmptyDocument())
+    // For an uninitialized main window shell, do not incur the cost of context initialization.
+    if (!m_windowShell->isGlobalInitialized())
         return;
 
     if (!initializeMainWorld())
         windowShell(DOMWrapperWorld::mainWorld())->updateDocument();
 }
 
 void ScriptController::namedItemAdded(HTMLDocument* doc, const AtomicString& name)
 {
     windowShell(DOMWrapperWorld::mainWorld())->namedItemAdded(doc, name);
 }
@@ skipping 142 matching lines @@
         v8Results = evaluateHandleScope.Escape(resultArray);
     }
 
     if (results && !v8Results.IsEmpty()) {
         for (size_t i = 0; i < v8Results->Length(); ++i)
             results->append(ScriptValue(v8Results->Get(i), m_isolate));
     }
 }
 
 } // namespace WebCore