Revert, causing browser crashes due to race

content/renderer/media/peer_connection_tracker.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_RENDERER_MEDIA_PEERCONNECTION_TRACKER_H_
 #define CONTENT_RENDERER_MEDIA_PEERCONNECTION_TRACKER_H_
 
 #include <map>
 
 #include "base/compiler_specific.h"
@@ skipping 143 matching lines @@
       const blink::WebUserMediaRequest& user_media_request);
 
  private:
   // Assign a local ID to a peer connection so that the browser process can
   // uniquely identify a peer connection in the renderer process.
   int GetNextLocalID();
 
   // IPC Message handler for getting all stats.
   void OnGetAllStats();
 
-  // Called when the browser process reports a suspend event from the OS.
-  void OnSuspend();
-
   void SendPeerConnectionUpdate(RTCPeerConnectionHandler* pc_handler,
                                 const std::string& callback_type,
                                 const std::string& value);
 
   // This map stores the local ID assigned to each RTCPeerConnectionHandler.
   typedef std::map<RTCPeerConnectionHandler*, int> PeerConnectionIdMap;
   PeerConnectionIdMap peer_connection_id_map_;
 
   // This keeps track of the next available local ID.
   int next_lid_;
 
   DISALLOW_COPY_AND_ASSIGN(PeerConnectionTracker);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_PEERCONNECTION_TRACKER_H_