Remove the WEB_AUDIO compile time flag

third_party/WebKit/Source/modules/webaudio/BiquadFilterNode.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 BiquadFilterNode_h
 #define BiquadFilterNode_h
 
 #include "core/dom/DOMTypedArray.h"
 #include "modules/webaudio/AudioNode.h"
 #include "modules/webaudio/BiquadProcessor.h"
 
-#if ENABLE(WEB_AUDIO)
-
 namespace blink {
 
 class AbstractAudioContext;
 class AudioParam;
 
 class BiquadFilterNode final : public AudioNode {
     DEFINE_WRAPPERTYPEINFO();
 public:
     // These must be defined as in the .idl file and must match those in the BiquadProcessor class.
     enum {
@@ skipping 32 matching lines @@
     bool setType(unsigned); // Returns true on success.
 
     Member<AudioParam> m_frequency;
     Member<AudioParam> m_q;
     Member<AudioParam> m_gain;
     Member<AudioParam> m_detune;
 };
 
 } // namespace blink
 
-#endif // ENABLE(WEB_AUDIO)
-
 #endif // BiquadFilterNode_h