Eliminate "temporary" and "uninitialized" isolated worlds

Source/bindings/v8/ScriptController.h

 /*
  * Copyright (C) 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 86 matching lines @@
     // The caller must hold an execution context.
     ScriptValue evaluate(const ScriptSourceCode&);
 
     // Executes JavaScript in an isolated world. The script gets its own global scope,
     // its own prototypes for intrinsic JavaScript objects (String, Array, and so-on),
     // and its own wrappers for all DOM nodes and DOM constructors.
     //
     // If an isolated world with the specified ID already exists, it is reused.
     // Otherwise, a new world is created.
     //
-    // If the worldID is 0 or DOMWrapperWorld::uninitializedWorldId, a new world is always created.
-    //
     // FIXME: Get rid of extensionGroup here.
     void evaluateInIsolatedWorld(int worldID, const Vector<ScriptSourceCode>& sources, int extensionGroup, Vector<ScriptValue>* results);
 
     // Returns true if the current world is isolated, and has its own Content
     // Security Policy. In this case, the policy of the main world should be
     // ignored when evaluating resources injected into the DOM.
     bool shouldBypassMainWorldContentSecurityPolicy();
 
     // FIXME: Remove references to this call in chromium and delete it.
     inline static void setIsolatedWorldSecurityOrigin(int worldID, PassRefPtr<SecurityOrigin> origin)
@@ skipping 102 matching lines @@
     // destroyed.
     NPObject* m_wrappedWindowScriptNPObject;
 
     // All of the extensions registered with the context.
     static V8Extensions m_extensions;
 };
 
 } // namespace WebCore
 
 #endif // ScriptController_h