Remove Apple's unused implementation of private browsing from WebCore

Source/WebCore/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 4013 matching lines @@
 {
     m_mediaVolumeCallbackElements.remove(e);
 }
 
 void Document::storageBlockingStateDidChange()
 {
     if (Settings* settings = this->settings())
         securityOrigin()->setStorageBlockingPolicy(settings->storageBlockingPolicy());
 }
 
-void Document::privateBrowsingStateDidChange() 
-{
-    HashSet<Element*>::iterator end = m_privateBrowsingStateChangedElements.end();
-    for (HashSet<Element*>::iterator it = m_privateBrowsingStateChangedElements.begin(); it != end; ++it)
-        (*it)->privateBrowsingStateDidChange();
-}
-
-void Document::registerForPrivateBrowsingStateChangedCallbacks(Element* e)
-{
-    m_privateBrowsingStateChangedElements.add(e);
-}
-
-void Document::unregisterForPrivateBrowsingStateChangedCallbacks(Element* e)
-{
-    m_privateBrowsingStateChangedElements.remove(e);
-}
-
 #if ENABLE(VIDEO_TRACK)
 void Document::registerForCaptionPreferencesChangedCallbacks(Element* e)
 {
     if (page())
         page()->group().captionPreferences()->setInterestedInCaptionPreferenceChanges();
 
     m_captionPreferencesChangedElements.add(e);
 }
 
 void Document::unregisterForCaptionPreferencesChangedCallbacks(Element* e)
@@ skipping 1772 matching lines @@
     info.addMember(m_title.string(), "title.string()");
     info.addMember(m_rawTitle.string(), "rawTitle.string()");
     info.addMember(m_xmlEncoding, "xmlEncoding");
     info.addMember(m_xmlVersion, "xmlVersion");
     info.addMember(m_contentLanguage, "contentLanguage");
     info.addMember(m_annotatedRegions, "annotatedRegions");
     info.addMember(m_cssCanvasElements, "cssCanvasElements");
     info.addMember(m_iconURLs, "iconURLs");
     info.addMember(m_documentSuspensionCallbackElements, "documentSuspensionCallbackElements");
     info.addMember(m_mediaVolumeCallbackElements, "mediaVolumeCallbackElements");
-    info.addMember(m_privateBrowsingStateChangedElements, "privateBrowsingStateChangedElements");
     info.addMember(m_elementsByAccessKey, "elementsByAccessKey");
     info.addMember(m_eventQueue, "eventQueue");
     info.addMember(m_mediaCanStartListeners, "mediaCanStartListeners");
     info.addMember(m_pendingTasks, "pendingTasks");
 #if ENABLE(LINK_PRERENDER)
     info.addMember(m_prerenderer, "prerenderer");
 #endif
     info.addMember(m_listsInvalidatedAtDocument, "listsInvalidatedAtDocument");
     info.addMember(m_styleResolverThrowawayTimer, "styleResolverThrowawayTimer");
     info.addMember(m_domWindow, "domWindow");
@@ skipping 112 matching lines @@
         return;
 
     Vector<RefPtr<Element> > associatedFormControls;
     copyToVector(m_associatedFormControls, associatedFormControls);
 
     frame()->page()->chrome()->client()->didAssociateFormControls(associatedFormControls);
     m_associatedFormControls.clear();
 }
 
 } // namespace WebCore