Add missing macros includes in media/.

media/base/null_video_sink.h

 // Copyright 2015 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_NULL_VIDEO_SINK_H_
 #define MEDIA_AUDIO_NULL_VIDEO_SINK_H_
 
 #include "base/cancelable_callback.h"
+#include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time/default_tick_clock.h"
 #include "base/time/tick_clock.h"
 #include "media/base/media_export.h"
 #include "media/base/video_renderer_sink.h"
 
 namespace base {
 class SingleThreadTaskRunner;
 }
 
@@ skipping 68 matching lines @@
 
   // Value passed to RenderCallback::Render().
   bool background_render_;
 
   DISALLOW_COPY_AND_ASSIGN(NullVideoSink);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_NULL_VIDEO_SINK_H_