Remove the WEB_AUDIO compile time flag

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

 /*
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 #include "platform/audio/HRTFKernel.h"
-
-#if ENABLE(WEB_AUDIO)
 #include "platform/audio/AudioChannel.h"
 #include "platform/FloatConversion.h"
 #include "wtf/MathExtras.h"
 #include <algorithm>
 
 namespace blink {
 
 // Takes the input AudioChannel as an input impulse response and calculates the average group delay.
 // This represents the initial delay before the most energetic part of the impulse response.
 // The sample-frame delay is removed from the impulseP impulse response, and this value  is returned.
@@ skipping 79 matching lines @@
         return nullptr;
 
     float frameDelay = (1 - x) * kernel1->frameDelay() + x * kernel2->frameDelay();
 
     OwnPtr<FFTFrame> interpolatedFrame = FFTFrame::createInterpolatedFrame(*kernel1->fftFrame(), *kernel2->fftFrame(), x);
     return HRTFKernel::create(interpolatedFrame.release(), frameDelay, sampleRate1);
 }
 
 } // namespace blink
 
-#endif // ENABLE(WEB_AUDIO)