Remove the WEB_AUDIO compile time flag

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

 /*
  * Copyright (C) 2010, 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 11 matching lines @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef AudioUtilities_h
 #define AudioUtilities_h
 
 #include "platform/PlatformExport.h"
 #include "wtf/build_config.h"
 #include <cstddef>
 
-#if ENABLE(WEB_AUDIO)
-
 namespace blink {
 namespace AudioUtilities {
 
 // Standard functions for converting to and from decibel values from linear.
 PLATFORM_EXPORT float linearToDecibels(float);
 PLATFORM_EXPORT float decibelsToLinear(float);
 
 // timeConstant is the time it takes a first-order linear time-invariant system
 // to reach the value 1 - 1/e (around 63.2%) given a step input response.
 // discreteTimeConstantForSampleRate() will return the discrete time-constant for the specific sampleRate.
 PLATFORM_EXPORT double discreteTimeConstantForSampleRate(double timeConstant, double sampleRate);
 
 // Convert the time to a sample frame at the given sample rate.
 PLATFORM_EXPORT size_t timeToSampleFrame(double time, double sampleRate);
 
 // Check that |sampleRate| is a valid rate for AudioBuffers.
 PLATFORM_EXPORT bool isValidAudioBufferSampleRate(float sampleRate);
 
 // Return max/min sample rate supported by AudioBuffers.
 PLATFORM_EXPORT float minAudioBufferSampleRate();
 PLATFORM_EXPORT float maxAudioBufferSampleRate();
 } // AudioUtilites
 } // namespace blink
 
-#endif // ENABLE(WEB_AUDIO)
-
 #endif // AudioUtilities_h