Changed raw pointer to WeakPtr to prevent use-after-free on destruction.

content/browser/renderer_host/media/peer_connection_tracker_host.h

 // Copyright (c) 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 CONTENT_BROWSER_RENDERER_HOST_MEDIA_PEER_CONNECTION_TRACKER_HOST_H_
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_PEER_CONNECTION_TRACKER_HOST_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
@@ skipping 10 matching lines @@
 
 class WebRTCEventLogHost;
 
 // This class is the host for PeerConnectionTracker in the browser process
 // managed by RenderProcessHostImpl. It receives PeerConnection events from
 // PeerConnectionTracker as IPC messages that it forwards to WebRTCInternals.
 // It also forwards browser process events to PeerConnectionTracker via IPC.
 class PeerConnectionTrackerHost : public BrowserMessageFilter,
                                   public base::PowerObserver {
  public:
-  PeerConnectionTrackerHost(int render_process_id,
-                            WebRTCEventLogHost* event_log_host);
+  PeerConnectionTrackerHost(
+      int render_process_id,
+      const base::WeakPtr<WebRTCEventLogHost>& event_log_host);
 
   // content::BrowserMessageFilter override.
   bool OnMessageReceived(const IPC::Message& message) override;
   void OverrideThreadForMessage(const IPC::Message& message,
                                 BrowserThread::ID* thread) override;
   void OnChannelConnected(int32_t peer_pid) override;
   void OnChannelClosing() override;
 
   // base::PowerObserver override.
   void OnSuspend() override;
@@ skipping 10 matching lines @@
   void OnAddStats(int lid, const base::ListValue& value);
   void OnGetUserMedia(const std::string& origin,
                       bool audio,
                       bool video,
                       const std::string& audio_constraints,
                       const std::string& video_constraints);
   void SendOnSuspendOnUIThread();
 
   int render_process_id_;
 
-  WebRTCEventLogHost* const event_log_host_;
+  base::WeakPtr<WebRTCEventLogHost> event_log_host_;
 
   DISALLOW_COPY_AND_ASSIGN(PeerConnectionTrackerHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_PEER_CONNECTION_TRACKER_HOST_H_