Remove the WEB_AUDIO compile time flag

third_party/WebKit/Source/modules/webaudio/GainNode.cpp

 /*
  * 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
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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 #include "modules/webaudio/GainNode.h"
-
-#if ENABLE(WEB_AUDIO)
 #include "modules/webaudio/AudioNodeInput.h"
 #include "modules/webaudio/AudioNodeOutput.h"
 #include "platform/audio/AudioBus.h"
 
 namespace blink {
 
 GainHandler::GainHandler(AudioNode& node, float sampleRate, AudioParamHandler& gain)
     : AudioHandler(NodeTypeGain, node, sampleRate)
     , m_lastGain(1.0)
     , m_gain(gain)
@@ skipping 96 matching lines @@
 }
 
 DEFINE_TRACE(GainNode)
 {
     visitor->trace(m_gain);
     AudioNode::trace(visitor);
 }
 
 } // namespace blink
 
-#endif // ENABLE(WEB_AUDIO)