Add missing macros includes in media/.

media/audio/alsa/alsa_output.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.
 //
 // Creates an output stream based on the ALSA PCM interface.
 //
 // On device write failure, the stream will move itself to an invalid state.
 // No more data will be pulled from the data source, or written to the device.
 // All calls to public API functions will either no-op themselves, or return an
 // error if possible.  Specifically, If the stream is in an error state, Open()
 // will return false, and Start() will call OnError() immediately on the
 // provided callback.
 //
 // If the stream is successfully opened, Close() must be called.  After Close
 // has been called, the object should be regarded as deleted and not touched.
 //
 // AlsaPcmOutputStream is a single threaded class that should only be used from
 // the audio thread. When modifying the code in this class, please read the
 // threading assumptions at the top of the implementation.
 
 #ifndef MEDIA_AUDIO_ALSA_ALSA_OUTPUT_H_
 #define MEDIA_AUDIO_ALSA_ALSA_OUTPUT_H_
 
 #include <alsa/asoundlib.h>
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
+#include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 #include "media/audio/audio_io.h"
 #include "media/audio/audio_parameters.h"
 
 namespace base {
 class MessageLoop;
 }
 
@@ skipping 180 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(AlsaPcmOutputStream);
 };
 
 MEDIA_EXPORT std::ostream& operator<<(std::ostream& os,
                                       AlsaPcmOutputStream::InternalState);
 
 };  // namespace media
 
 #endif  // MEDIA_AUDIO_ALSA_ALSA_OUTPUT_H_