Remove MEDIA_SOURCE feature define.

Source/WebCore/bindings/generic/RuntimeEnabledFeatures.cpp

 /*
  * Copyright (C) 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 149 matching lines @@
     return DatabaseManager::manager().isAvailable();
 }
 #endif
 
 #if ENABLE(QUOTA)
 bool RuntimeEnabledFeatures::isQuotaEnabled = false;
 #endif
 
 bool RuntimeEnabledFeatures::isFullScreenAPIEnabled = true;
 
-#if ENABLE(MEDIA_SOURCE)
 bool RuntimeEnabledFeatures::isMediaSourceEnabled = false;
-#endif
 
 #if ENABLE(VIDEO_TRACK)
 #if PLATFORM(MAC) || PLATFORM(GTK) || PLATFORM(CHROMIUM) || PLATFORM(BLACKBERRY) || PLATFORM(WIN)
     bool RuntimeEnabledFeatures::isVideoTrackEnabled = true;
 #else
     bool RuntimeEnabledFeatures::isVideoTrackEnabled = false;
 #endif
 #endif
 
 #if ENABLE(ENCRYPTED_MEDIA)
@@ skipping 50 matching lines @@
 
 #if ENABLE(IFRAME_SEAMLESS)
 bool RuntimeEnabledFeatures::areSeamlessIFramesEnabled = false;
 #endif
 
 #if ENABLE(FONT_LOAD_EVENTS)
 bool RuntimeEnabledFeatures::isFontLoadEventsEnabled = false;
 #endif
 
 } // namespace WebCore