Removing #ifdefs for WEB_AUDIO compile time flag.

Source/platform/exported/WebMediaStreamTrack.cpp

 /*
  * 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:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 122 matching lines @@
     ASSERT(!m_private.isNull());
 
     if (extraData)
         extraData->setOwner(m_private.get());
 
     m_private->setExtraData(adoptPtr(new ExtraDataContainer(adoptPtr(extraData))));
 }
 
 void WebMediaStreamTrack::setSourceProvider(WebAudioSourceProvider* provider)
 {
-#if ENABLE(WEB_AUDIO)
     ASSERT(!m_private.isNull());
     m_private->setSourceProvider(provider);
-#endif // ENABLE(WEB_AUDIO)
 }
 
 void WebMediaStreamTrack::assign(const WebMediaStreamTrack& other)
 {
     m_private = other.m_private;
 }
 
 } // namespace blink