Remove the WEB_AUDIO compile time flag

third_party/WebKit/Source/platform/mediastream/MediaStreamWebAudioSource.cpp

 /*
  * Copyright 2014 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 11 matching lines @@
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "platform/mediastream/MediaStreamWebAudioSource.h"
-
-#if ENABLE(WEB_AUDIO)
 #include "platform/audio/AudioBus.h"
 #include "public/platform/WebAudioSourceProvider.h"
 
 namespace blink {
 
 MediaStreamWebAudioSource::MediaStreamWebAudioSource(PassOwnPtr<WebAudioSourceProvider> provider)
     : m_webAudioSourceProvider(std::move(provider))
 {
 }
 
@@ skipping 16 matching lines @@
     size_t n = bus->numberOfChannels();
     WebVector<float*> webAudioData(n);
     for (size_t i = 0; i < n; ++i)
         webAudioData[i] = bus->channel(i)->mutableData();
 
     m_webAudioSourceProvider->provideInput(webAudioData, framesToProcess);
 }
 
 } // namespace blink
 
-#endif // ENABLE(WEB_AUDIO)