Remove the WEB_AUDIO compile time flag

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

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef StereoPanner_h
 #define StereoPanner_h
 
 #include "platform/audio/Spatializer.h"
 
-#if ENABLE(WEB_AUDIO)
-
 namespace blink {
 
 // Common type of stereo panner as found in normal audio mixing equipment.
 // See: http://webaudio.github.io/web-audio-api/#the-stereopannernode-interface
 
 class PLATFORM_EXPORT StereoPanner final : public Spatializer {
 public:
     explicit StereoPanner(float sampleRate);
 
     void panWithSampleAccurateValues(const AudioBus* inputBus, AudioBus* outputBuf, const float* panValues, size_t framesToProcess) override;
     void panToTargetValue(const AudioBus* inputBus, AudioBus* outputBuf, float panValue, size_t framesToProcess) override;
 
     void reset() override { }
 
     double tailTime() const override { return 0; }
     double latencyTime() const override { return 0; }
 
 private:
     bool m_isFirstRender;
     double m_smoothingConstant;
 
     double m_pan;
 };
 
 } // namespace blink
 
-#endif // ENABLE(WEB_AUDIO)
-
 #endif // StereoPanner_h