Remove the WEB_AUDIO compile time flag

third_party/WebKit/Source/modules/webaudio/ChannelSplitterNode.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 10 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef ChannelSplitterNode_h
 #define ChannelSplitterNode_h
 
 #include "modules/webaudio/AudioNode.h"
 #include "wtf/PassRefPtr.h"
 
-#if ENABLE(WEB_AUDIO)
-
 namespace blink {
 
 class AbstractAudioContext;
 
 class ChannelSplitterHandler final : public AudioHandler {
 public:
     static PassRefPtr<ChannelSplitterHandler> create(AudioNode&, float sampleRate, unsigned numberOfOutputs);
 
     // AudioHandler
     void process(size_t framesToProcess) override;
 
 private:
     ChannelSplitterHandler(AudioNode&, float sampleRate, unsigned numberOfOutputs);
 };
 
 class ChannelSplitterNode final : public AudioNode {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static ChannelSplitterNode* create(AbstractAudioContext&, float sampleRate, unsigned numberOfOutputs);
 
 private:
     ChannelSplitterNode(AbstractAudioContext&, float sampleRate, unsigned numberOfOutputs);
 };
 
 } // namespace blink
 
-#endif // ENABLE(WEB_AUDIO)
-
 #endif // ChannelSplitterNode_h