Remove the WEB_AUDIO compile time flag

third_party/WebKit/Source/platform/audio/HRTFElevation.cpp

 /*
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 #include "platform/audio/HRTFElevation.h"
-
-#if ENABLE(WEB_AUDIO)
 #include <math.h>
 #include <algorithm>
 #include "platform/audio/AudioBus.h"
 #include "platform/audio/HRTFPanner.h"
 #include "wtf/ThreadingPrimitives.h"
 #include "wtf/text/StringHash.h"
 
 namespace blink {
 
 const unsigned HRTFElevation::AzimuthSpacing = 15;
@@ skipping 277 matching lines @@
     double frameDelay2L = m_kernelListL->at(azimuthIndex2)->frameDelay();
     double frameDelay2R = m_kernelListR->at(azimuthIndex2)->frameDelay();
 
     // Linearly interpolate delays.
     frameDelayL = (1.0 - azimuthBlend) * frameDelayL + azimuthBlend * frameDelay2L;
     frameDelayR = (1.0 - azimuthBlend) * frameDelayR + azimuthBlend * frameDelay2R;
 }
 
 } // namespace blink
 
-#endif // ENABLE(WEB_AUDIO)