Remove MEDIA_SOURCE feature define.

Source/WebCore/Modules/mediasource/MediaSourceRegistry.h

 /*
  * Copyright (C) 2012 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 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef MediaSourceRegistry_h
 #define MediaSourceRegistry_h
 
-#if ENABLE(MEDIA_SOURCE)
-
 #include <wtf/HashMap.h>
 #include <wtf/PassRefPtr.h>
 #include <wtf/text/StringHash.h>
 
 namespace WebCore {
 
 class KURL;
 class MediaSource;
 
 class MediaSourceRegistry {
 public:
     // Returns a single instance of MediaSourceRegistry.
     static MediaSourceRegistry& registry();
 
     // Registers a blob URL referring to the specified media source.
     void registerMediaSourceURL(const KURL&, PassRefPtr<MediaSource>);
     void unregisterMediaSourceURL(const KURL&);
 
     MediaSource* lookupMediaSource(const String& url);
 
 private:
     HashMap<String, RefPtr<MediaSource> > m_mediaSources;
 };
 
 } // namespace WebCore
 
 #endif
-#endif