Add missing macros includes in media/.

media/formats/mp4/sample_to_group_iterator.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_FORMATS_MP4_SAMPLE_TO_GROUP_ITERATOR_H_
 #define MEDIA_FORMATS_MP4_SAMPLE_TO_GROUP_ITERATOR_H_
 
 #include <vector>
 
+#include "base/macros.h"
 #include "media/formats/mp4/box_definitions.h"
 
 namespace media {
 namespace mp4 {
 
 // Sample To Group Box ('sbgp') can be used to find the group that a sample
 // belongs to and the associated description of that sample group. It is
 // compactly coded though. This class implements the iterator to iterate
 // through the compressed table to get the associated sample group description
 // index.
@@ skipping 20 matching lines @@
   const std::vector<SampleToGroupEntry>& sample_to_group_table_;
   std::vector<SampleToGroupEntry>::const_iterator iterator_;
 
   DISALLOW_COPY_AND_ASSIGN(SampleToGroupIterator);
 };
 
 }  // namespace mp4
 }  // namespace media
 
 #endif  // MEDIA_FORMATS_MP4_SAMPLE_TO_GROUP_ITERATOR_H_