Add missing macros includes in media/.

media/filters/blocking_url_protocol.h

 // Copyright (c) 2012 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_FILTERS_BLOCKING_URL_PROTOCOL_H_
 #define MEDIA_FILTERS_BLOCKING_URL_PROTOCOL_H_
 
 #include "base/callback.h"
+#include "base/macros.h"
 #include "base/synchronization/waitable_event.h"
 #include "media/filters/ffmpeg_glue.h"
 
 namespace media {
 
 class DataSource;
 
 // An implementation of FFmpegURLProtocol that blocks until the underlying
 // asynchronous DataSource::Read() operation completes.
 class MEDIA_EXPORT BlockingUrlProtocol : public FFmpegURLProtocol {
@@ skipping 34 matching lines @@
 
   // Cached position within the data source.
   int64_t read_position_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(BlockingUrlProtocol);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_BLOCKING_URL_PROTOCOL_H_