Remove UserScript support, which is not used by Chromium

Source/WebCore/loader/FrameLoader.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008 Alp Toker <alp@atoker.com>
  * Copyright (C) Research In Motion Limited 2009. All rights reserved.
  * Copyright (C) 2011 Kris Jordan <krisjordan@gmail.com>
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ skipping 659 matching lines @@
             if (!headerContentLanguage.isEmpty())
                 m_frame->document()->setContentLanguage(headerContentLanguage);
         }
     }
 
     history()->restoreDocumentState();
 }
 
 void FrameLoader::finishedParsing()
 {
-    m_frame->injectUserScripts(InjectAtDocumentEnd);
-
     if (m_stateMachine.creatingInitialEmptyDocument())
         return;
 
     // This can be called from the Frame's destructor, in which case we shouldn't protect ourselves
     // because doing so will cause us to re-enter the destructor when protector goes out of scope.
     // Null-checking the FrameView indicates whether or not we're in the destructor.
     RefPtr<Frame> protector = m_frame->view() ? m_frame : 0;
 
     m_client->dispatchDidFinishDocumentLoad();
 
@@ skipping 2374 matching lines @@
     documentLoader()->setTitle(title);
 }
 
 String FrameLoader::referrer() const
 {
     return m_documentLoader ? m_documentLoader->request().httpReferrer() : "";
 }
 
 void FrameLoader::dispatchDocumentElementAvailable()
 {
-    m_frame->injectUserScripts(InjectAtDocumentStart);
     m_client->documentElementAvailable();
 }
 
 void FrameLoader::dispatchDidClearWindowObjectsInAllWorlds()
 {
     if (!m_frame->script()->canExecuteScripts(NotAboutToExecuteScript))
         return;
 
     Vector<RefPtr<DOMWrapperWorld> > worlds;
     ScriptController::getAllWorlds(worlds);
@@ skipping 188 matching lines @@
     FloatRect newWindowRect = DOMWindow::adjustWindowRect(page, windowRect);
 
     page->chrome()->setWindowRect(newWindowRect);
     page->chrome()->show();
 
     created = true;
     return frame;
 }
 
 } // namespace WebCore