Remove the WEB_AUDIO compile time flag

third_party/WebKit/Source/modules/webaudio/AudioDestinationNode.h

 /*
  * Copyright (C) 2010, 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 13 matching lines @@
 
 #ifndef AudioDestinationNode_h
 #define AudioDestinationNode_h
 
 #include "modules/webaudio/AudioBuffer.h"
 #include "modules/webaudio/AudioNode.h"
 #include "platform/audio/AudioBus.h"
 #include "platform/audio/AudioIOCallback.h"
 #include "platform/audio/AudioSourceProvider.h"
 
-#if ENABLE(WEB_AUDIO)
-
 namespace blink {
 
 class AudioBus;
 class AbstractAudioContext;
 
 class AudioDestinationHandler : public AudioHandler, public AudioIOCallback {
 public:
     AudioDestinationHandler(AudioNode&, float sampleRate);
     ~AudioDestinationHandler() override;
 
@@ skipping 53 matching lines @@
     AudioDestinationHandler& audioDestinationHandler() const;
 
     unsigned long maxChannelCount() const;
 
 protected:
     AudioDestinationNode(AbstractAudioContext&);
 };
 
 } // namespace blink
 
-#endif // ENABLE(WEB_AUDIO)
-
 #endif // AudioDestinationNode_h