Remove MEDIA_SOURCE feature define.

Source/WebCore/html/HTMLMediaElement.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 160 matching lines @@
     bool webkitHasClosedCaptions() const;
     bool webkitClosedCaptionsVisible() const;
     void setWebkitClosedCaptionsVisible(bool);
 
 #if ENABLE(MEDIA_STATISTICS)
 // Statistics
     unsigned webkitAudioDecodedByteCount() const;
     unsigned webkitVideoDecodedByteCount() const;
 #endif
 
-#if ENABLE(MEDIA_SOURCE)
 //  Media Source.
     void setSourceState(const String&);
-#endif 
 
 #if ENABLE(ENCRYPTED_MEDIA)
     void webkitGenerateKeyRequest(const String& keySystem, PassRefPtr<Uint8Array> initData, ExceptionCode&);
     void webkitGenerateKeyRequest(const String& keySystem, ExceptionCode&);
     void webkitAddKey(const String& keySystem, PassRefPtr<Uint8Array> key, PassRefPtr<Uint8Array> initData, const String& sessionId, ExceptionCode&);
     void webkitAddKey(const String& keySystem, PassRefPtr<Uint8Array> key, ExceptionCode&);
     void webkitCancelKeyRequest(const String& keySystem, const String& sessionId, ExceptionCode&);
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(webkitkeyadded);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(webkitkeyerror);
@@ skipping 441 matching lines @@
     BehaviorRestrictions m_restrictions;
     
     MediaPlayer::Preload m_preload;
 
     DisplayMode m_displayMode;
 
     // Counter incremented while processing a callback from the media player, so we can avoid
     // calling the media engine recursively.
     int m_processingMediaPlayerCallback;
 
-#if ENABLE(MEDIA_SOURCE)
     RefPtr<MediaSource> m_mediaSource;
-#endif
 
     mutable float m_cachedTime;
     mutable double m_cachedTimeWallClockUpdateTime;
     mutable double m_minimumWallClockTimeToCacheMediaTime;
 
     double m_fragmentStartTime;
     double m_fragmentEndTime;
 
     typedef unsigned PendingActionFlags;
     PendingActionFlags m_pendingActionFlags;
@@ skipping 103 matching lines @@
 inline HTMLMediaElement* toMediaElement(Node* node)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(!node || isMediaElement(node));
     return static_cast<HTMLMediaElement*>(node);
 }
 
 } //namespace
 
 #endif
 #endif