Remove the WEB_AUDIO compile time flag

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

 /*
  * Copyright (C) 2013 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 18 matching lines @@
  */
 
 #ifndef DownSampler_h
 #define DownSampler_h
 
 #include "platform/audio/AudioArray.h"
 #include "platform/audio/DirectConvolver.h"
 #include "wtf/Allocator.h"
 #include "wtf/Noncopyable.h"
 
-#if ENABLE(WEB_AUDIO)
-
 namespace blink {
 
 // DownSampler down-samples the source stream by a factor of 2x.
 
 class PLATFORM_EXPORT DownSampler {
     USING_FAST_MALLOC(DownSampler);
     WTF_MAKE_NONCOPYABLE(DownSampler);
 public:
     DownSampler(size_t inputBlockSize);
 
@@ skipping 19 matching lines @@
     DirectConvolver m_convolver;
 
     AudioFloatArray m_tempBuffer;
 
     // Used as delay-line (FIR filter history) for the input samples to account for the 0.5 term right in the middle of the kernel.
     AudioFloatArray m_inputBuffer;
 };
 
 } // namespace blink
 
-#endif // ENABLE(WEB_AUDIO)
-
 #endif // DownSampler_h