Add missing macros includes in media/.

media/base/media_file_checker.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.
 
 #ifndef MEDIA_BASE_MEDIA_FILE_CHECKER_H_
 #define MEDIA_BASE_MEDIA_FILE_CHECKER_H_
 
 #include "base/files/file.h"
+#include "base/macros.h"
 #include "media/base/media_export.h"
 
 namespace base {
 class TimeDelta;
 }
 
 namespace media {
 
 // This class tries to determine if a file is a valid media file. The entire
 // file is not decoded so a positive result from this class does not make the
@@ skipping 10 matching lines @@
 
  private:
   base::File file_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaFileChecker);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_MEDIA_FILE_CHECKER_H_