Remove MEDIA_SOURCE feature define.

Source/WebCore/platform/graphics/MediaSourcePrivate.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 12 matching lines @@
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * 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 MediaSourcePrivate_h
 #define MediaSourcePrivate_h
 
-#if ENABLE(MEDIA_SOURCE)
-
 #include <wtf/Forward.h>
 
 namespace WebCore {
 
 class SourceBufferPrivate;
 
 class MediaSourcePrivate {
 public:
     typedef Vector<String, 0> CodecsArray;
 
     MediaSourcePrivate() { }
     virtual ~MediaSourcePrivate() { }
 
     enum AddStatus { Ok, NotSupported, ReachedIdLimit };
     virtual AddStatus addSourceBuffer(const String& type, const CodecsArray&, OwnPtr<SourceBufferPrivate>*) = 0;
     virtual double duration() = 0;
     virtual void setDuration(double) = 0;
     enum EndOfStreamStatus { EosNoError, EosNetworkError, EosDecodeError };
     virtual void endOfStream(EndOfStreamStatus) = 0;
 };
 
 }
 
 #endif
-#endif