Remove the WEB_AUDIO compile time flag

third_party/WebKit/Source/platform/audio/AudioFIFO.h

 /*
  * Copyright (C) 2012 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
@@ skipping 14 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 AudioFIFO_h
 #define AudioFIFO_h
 
 #include "platform/audio/AudioBus.h"
 #include "wtf/Allocator.h"
 
-#if ENABLE(WEB_AUDIO)
-
 namespace blink {
 
 class AudioFIFO {
     USING_FAST_MALLOC(AudioFIFO);
     WTF_MAKE_NONCOPYABLE(AudioFIFO);
 public:
     // Create a FIFO large enough to hold |fifoLength| frames of data of |numberOfChannels| channels.
     AudioFIFO(unsigned numberOfChannels, size_t fifoLength);
 
     // Push the data from the bus into the FIFO.
@@ skipping 23 matching lines @@
 
     // Where to start reading from the FIFO.
     size_t m_readIndex;
 
     // Where to start writing to the FIFO.
     size_t m_writeIndex;
 };
 
 } // namespace blink
 
-#endif // ENABLE(WEB_AUDIO)
-
 #endif // AudioFIFO.h