Add missing macros includes in media/.

media/formats/webm/webm_content_encodings_client.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_WEBM_WEBM_CONTENT_ENCODINGS_CLIENT_H_
 #define MEDIA_FORMATS_WEBM_WEBM_CONTENT_ENCODINGS_CLIENT_H_
 
 #include <vector>
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
+#include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "media/base/media_export.h"
 #include "media/base/media_log.h"
 #include "media/formats/webm/webm_content_encodings.h"
 #include "media/formats/webm/webm_parser.h"
 
 namespace media {
 
 typedef std::vector<ContentEncoding*> ContentEncodings;
 
@@ skipping 19 matching lines @@
 
   // |content_encodings_| is ready. For debugging purpose.
   bool content_encodings_ready_;
 
   DISALLOW_COPY_AND_ASSIGN(WebMContentEncodingsClient);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FORMATS_WEBM_WEBM_CONTENT_ENCODINGS_CLIENT_H_