Add missing macros includes in media/.

media/capture/content/smooth_event_sampler.h

 // Copyright (c) 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_CAPTURE_SMOOTH_EVENT_SAMPLER_H_
 #define MEDIA_CAPTURE_SMOOTH_EVENT_SAMPLER_H_
 
+#include "base/macros.h"
 #include "base/time/time.h"
 #include "media/base/media_export.h"
 
 namespace media {
 
 // Filters a sequence of events to achieve a target frequency.
 class MEDIA_EXPORT SmoothEventSampler {
  public:
   enum {
     // The maximum amount of time that can elapse before considering unchanged
@@ skipping 40 matching lines @@
   base::TimeTicks last_sample_;
   int overdue_sample_count_;
   base::TimeDelta token_bucket_;
 
   DISALLOW_COPY_AND_ASSIGN(SmoothEventSampler);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_CAPTURE_SMOOTH_EVENT_SAMPLER_H_