Cast: added missing include in simple_event_subscriber.h.

media/cast/logging/simple_event_subscriber.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_CAST_LOGGING_SIMPLE_EVENT_SUBSCRIBER_H_
 #define MEDIA_CAST_LOGGING_SIMPLE_EVENT_SUBSCRIBER_H_
 
 #include <vector>
 
+#include "base/compiler_specific.h"
 #include "base/threading/thread_checker.h"
 #include "media/cast/logging/raw_event_subscriber.h"
 
 namespace media {
 namespace cast {
 
 // RawEventSubscriber implementation that records all incoming raw events
 // in std::vector's.
 // The user of this class can call the GetXXXEventsAndReset functions to get
 // list of events that have acccumulated since last inovcation.
@@ skipping 29 matching lines @@
   // All functions must be called on the main thread.
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(SimpleEventSubscriber);
 };
 
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_LOGGING_SIMPLE_EVENT_SUBSCRIBER_H_