Remove the WEB_AUDIO compile time flag

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

 /*
  * Copyright (C) 2011, 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 11 matching lines @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef DefaultAudioDestinationNode_h
 #define DefaultAudioDestinationNode_h
 
 #include "modules/webaudio/AudioDestinationNode.h"
 #include "platform/audio/AudioDestination.h"
 #include "wtf/OwnPtr.h"
 
-#if ENABLE(WEB_AUDIO)
-
 namespace blink {
 
 class AbstractAudioContext;
 class ExceptionState;
 
 class DefaultAudioDestinationHandler final : public AudioDestinationHandler {
 public:
     static PassRefPtr<DefaultAudioDestinationHandler> create(AudioNode&);
     ~DefaultAudioDestinationHandler() override;
 
@@ skipping 20 matching lines @@
 class DefaultAudioDestinationNode final : public AudioDestinationNode {
 public:
     static DefaultAudioDestinationNode* create(AbstractAudioContext*);
 
 private:
     explicit DefaultAudioDestinationNode(AbstractAudioContext&);
 };
 
 } // namespace blink
 
-#endif // ENABLE(WEB_AUDIO)
-
 #endif // DefaultAudioDestinationNode_h