Add missing macros includes in media/.

media/audio/audio_power_monitor.h

 // Copyright 2013 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 MEDIA_AUDIO_AUDIO_POWER_MONITOR_H_
 #define MEDIA_AUDIO_AUDIO_POWER_MONITOR_H_
 
 #include <limits>
 #include <utility>
 
 #include "base/callback.h"
+#include "base/macros.h"
 #include "base/synchronization/lock.h"
 #include "media/base/media_export.h"
 
 // An audio signal power monitor.  It is periodically provided an AudioBus by
 // the native audio thread, and the audio samples in each channel are analyzed
 // to determine the average power of the signal over a time period.  Here
 // "average power" is a running average calculated by using a first-order
 // low-pass filter over the square of the samples scanned.  Whenever reporting
 // the power level, this running average is converted to dBFS (decibels relative
 // to full-scale) units.
@@ skipping 56 matching lines @@
   base::Lock reading_lock_;
   float power_reading_;
   bool clipped_reading_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioPowerMonitor);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_AUDIO_POWER_MONITOR_H_