Remove MEDIA_SOURCE feature define.

Source/WebKit/chromium/src/WebRuntimeFeatures.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 361 matching lines @@
     RuntimeEnabledFeatures::setWebkitFullScreenAPIEnabled(enable);
 }
 
 bool WebRuntimeFeatures::isFullScreenAPIEnabled()
 {
     return RuntimeEnabledFeatures::webkitFullScreenAPIEnabled();
 }
 
 void WebRuntimeFeatures::enableMediaSource(bool enable)
 {
-#if ENABLE(MEDIA_SOURCE)
     RuntimeEnabledFeatures::setMediaSourceEnabled(enable);
-#else
-    UNUSED_PARAM(enable);
-#endif
 }
 
 bool WebRuntimeFeatures::isMediaSourceEnabled()
 {
-#if ENABLE(MEDIA_SOURCE)
     return RuntimeEnabledFeatures::mediaSourceEnabled();
-#else
-    return false;
-#endif
 }
 
 void WebRuntimeFeatures::enableEncryptedMedia(bool enable)
 {
 #if ENABLE(ENCRYPTED_MEDIA)
     RuntimeEnabledFeatures::setEncryptedMediaEnabled(enable);
 #else
     UNUSED_PARAM(enable);
 #endif
 }
@@ skipping 314 matching lines @@
 bool WebRuntimeFeatures::isRequestAutocompleteEnabled()
 {
 #if ENABLE(REQUEST_AUTOCOMPLETE)
     return RuntimeEnabledFeatures::requestAutocompleteEnabled();
 #else
     return false;
 #endif
 }
 
 } // namespace WebKit