Remove unused linked_ptr inclusion

chrome/renderer/media/cast_session_delegate.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 CHROME_RENDERER_MEDIA_CAST_SESSION_DELEGATE_H_
 #define CHROME_RENDERER_MEDIA_CAST_SESSION_DELEGATE_H_
 
 #include <map>
 #include <memory>
 #include <vector>
 
 #include "base/macros.h"
-#include "base/memory/linked_ptr.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_checker.h"
 #include "base/time/default_tick_clock.h"
 #include "media/cast/cast_config.h"
 #include "media/cast/cast_sender.h"
 #include "media/cast/logging/logging_defines.h"
 
 namespace base {
@@ skipping 124 matching lines @@
   VideoFrameInputAvailableCallback video_frame_input_available_callback_;
 
   std::unique_ptr<media::cast::RawEventSubscriberBundle> event_subscribers_;
 
   base::WeakPtrFactory<CastSessionDelegate> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CastSessionDelegate);
 };
 
 #endif  // CHROME_RENDERER_MEDIA_CAST_SESSION_DELEGATE_H_