Add missing macros includes in media/.

media/cast/sender/audio_encoder.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 MEDIA_CAST_SENDER_AUDIO_ENCODER_H_
 #define MEDIA_CAST_SENDER_AUDIO_ENCODER_H_
 
+#include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "media/base/audio_bus.h"
 #include "media/cast/cast_environment.h"
 #include "media/cast/constants.h"
 #include "media/cast/sender/sender_encoded_frame.h"
 
 namespace base {
 class TimeTicks;
@@ skipping 37 matching lines @@
   // Used to ensure only one thread invokes InsertAudio().
   base::ThreadChecker insert_thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioEncoder);
 };
 
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_SENDER_AUDIO_ENCODER_H_