Add missing macros includes in media/.

media/base/serial_runner.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_BASE_SERIAL_RUNNER_H_
 #define MEDIA_BASE_SERIAL_RUNNER_H_
 
 #include <memory>
 #include <queue>
 
 #include "base/callback.h"
+#include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "media/base/media_export.h"
 #include "media/base/pipeline_status.h"
 
 namespace base {
 class SingleThreadTaskRunner;
 }
 
@@ skipping 57 matching lines @@
 
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<SerialRunner> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SerialRunner);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_SERIAL_RUNNER_H_