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

content/browser/media/webrtc/webrtc_eventlog_host.cc

 // Copyright 2016 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.
 
 #include "content/browser/media/webrtc/webrtc_eventlog_host.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/files/file_util.h"
@@ skipping 107 matching lines @@
   number_active_log_files_ = 0;
   rtc_event_logging_enabled_ = false;
   RenderProcessHost* host = RenderProcessHost::FromID(render_process_id_);
   if (host) {
     for (int local_id : active_peer_connection_local_ids_)
       host->Send(new PeerConnectionTracker_StopEventLog(local_id));
   }
   return true;
 }
 
+base::WeakPtr<WebRTCEventLogHost> WebRTCEventLogHost::GetWeakPtr() {
+  return weak_ptr_factory_.GetWeakPtr();
+}
+
 bool WebRTCEventLogHost::StartEventLogForPeerConnection(
     int peer_connection_local_id) {
   if (number_active_log_files_ < kMaxNumberLogFiles) {
     ++number_active_log_files_;
     BrowserThread::PostTaskAndReplyWithResult(
         BrowserThread::FILE, FROM_HERE,
         base::Bind(&CreateFileForProcess, base_file_path_, render_process_id_,
                    peer_connection_local_id),
         base::Bind(&WebRTCEventLogHost::SendEventLogFileToRenderer,
                    weak_ptr_factory_.GetWeakPtr(), peer_connection_local_id));
@@ skipping 12 matching lines @@
   if (rph) {
     rph->Send(new PeerConnectionTracker_StartEventLog(peer_connection_local_id,
                                                       file_for_transit));
   } else {
     --number_active_log_files_;
     IPC::PlatformFileForTransitToFile(file_for_transit).Close();
   }
 }
 
 }  // namespace content