Remove MEDIA_SOURCE feature define.

Source/WebKit/chromium/src/SourceBufferPrivateImpl.h

 /*
  * Copyright (C) 2013 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 SourceBufferPrivateImpl_h
 #define SourceBufferPrivateImpl_h
 
-#if ENABLE(MEDIA_SOURCE)
-
 #include "SourceBufferPrivate.h"
 #include <wtf/OwnPtr.h>
 #include <wtf/PassOwnPtr.h>
 
 namespace WebKit {
 
 class WebSourceBuffer;
 
 class SourceBufferPrivateImpl : public WebCore::SourceBufferPrivate {
 public:
     explicit SourceBufferPrivateImpl(PassOwnPtr<WebSourceBuffer>);
     virtual ~SourceBufferPrivateImpl() { }
 
     // SourceBufferPrivate methods.
     virtual PassRefPtr<WebCore::TimeRanges> buffered();
     virtual void append(const unsigned char* data, unsigned length);
     virtual void abort();
     virtual bool setTimestampOffset(double);
     virtual void removedFromMediaSource();
 
 private:
     OwnPtr<WebSourceBuffer> m_sourceBuffer;
 };
 
 
 }
 
 #endif
-#endif