Remove Apple's unused implementation of private browsing from WebCore

Source/WebCore/platform/graphics/MediaPlayer.h

 /*
  * Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012, 2013 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 371 matching lines @@
 
     double mediaTimeForTimeValue(double) const;
 
     double maximumDurationToCacheMediaTime() const;
 
     unsigned decodedFrameCount() const;
     unsigned droppedFrameCount() const;
     unsigned audioDecodedByteCount() const;
     unsigned videoDecodedByteCount() const;
 
-    void setPrivateBrowsingMode(bool);
-
 #if ENABLE(WEB_AUDIO)
     AudioSourceProvider* audioSourceProvider();
 #endif
 
 #if ENABLE(ENCRYPTED_MEDIA)
     void keyAdded(const String& keySystem, const String& sessionId);
     void keyError(const String& keySystem, const String& sessionId, MediaPlayerClient::MediaKeyErrorCode, unsigned short systemCode);
     void keyMessage(const String& keySystem, const String& sessionId, const unsigned char* message, unsigned messageLength, const KURL& defaultURL);
     bool keyNeeded(const String& keySystem, const String& sessionId, const unsigned char* initData, unsigned initDataLength);
 #endif
@@ skipping 44 matching lines @@
     String m_contentTypeCodecs;
     String m_keySystem;
     FrameView* m_frameView;
     IntSize m_size;
     Preload m_preload;
     bool m_visible;
     double m_rate;
     double m_volume;
     bool m_muted;
     bool m_preservesPitch;
-    bool m_privateBrowsing;
     bool m_shouldPrepareToRender;
     bool m_contentMIMETypeWasInferredFromExtension;
 
     RefPtr<MediaSource> m_mediaSource;
 };
 
 typedef PassOwnPtr<MediaPlayerPrivateInterface> (*CreateMediaEnginePlayer)(MediaPlayer*);
 typedef void (*MediaEngineSupportedTypes)(HashSet<String>& types);
 #if ENABLE(ENCRYPTED_MEDIA) || ENABLE(ENCRYPTED_MEDIA_V2)
 typedef MediaPlayer::SupportsType (*MediaEngineSupportsType)(const String& type, const String& codecs, const String& keySystem, const KURL& url);
 #else
 typedef MediaPlayer::SupportsType (*MediaEngineSupportsType)(const String& type, const String& codecs, const KURL& url);
 #endif
 typedef void (*MediaEngineGetSitesInMediaCache)(Vector<String>&);
 typedef void (*MediaEngineClearMediaCache)();
 typedef void (*MediaEngineClearMediaCacheForSite)(const String&);
 
 typedef void (*MediaEngineRegistrar)(CreateMediaEnginePlayer, MediaEngineSupportedTypes, MediaEngineSupportsType,
     MediaEngineGetSitesInMediaCache, MediaEngineClearMediaCache, MediaEngineClearMediaCacheForSite);
 
 }
 
 #endif // ENABLE(VIDEO)
 
 #endif