Add missing macros includes in media/.

media/base/audio_timestamp_helper.h

 // Copyright (c) 2012 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_BASE_AUDIO_TIMESTAMP_HELPER_H_
 #define MEDIA_BASE_AUDIO_TIMESTAMP_HELPER_H_
 
+#include "base/macros.h"
 #include "base/time/time.h"
 #include "media/base/media_export.h"
 
 namespace media {
 
 // Generates timestamps for a sequence of audio sample frames. This class should
 // be used any place timestamps need to be calculated for a sequence of audio
 // samples. It helps avoid timestamps inaccuracies caused by rounding/truncation
 // in repeated sample count to timestamp conversions.
 //
@@ skipping 45 matching lines @@
 
   // Number of frames accumulated by AddFrames() calls.
   int64_t frame_count_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(AudioTimestampHelper);
 };
 
 }  // namespace media
 
 #endif