Revert, causing browser crashes due to race

content/renderer/media/peer_connection_tracker.cc

 // 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.
 #include "content/renderer/media/peer_connection_tracker.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "content/common/media/peer_connection_tracker_messages.h"
 #include "content/renderer/media/rtc_media_constraints.h"
 #include "content/renderer/media/rtc_peer_connection_handler.h"
 #include "content/renderer/render_thread_impl.h"
@@ skipping 260 matching lines @@
 }
 
 PeerConnectionTracker::~PeerConnectionTracker() {
 }
 
 bool PeerConnectionTracker::OnControlMessageReceived(
     const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(PeerConnectionTracker, message)
     IPC_MESSAGE_HANDLER(PeerConnectionTracker_GetAllStats, OnGetAllStats)
-    IPC_MESSAGE_HANDLER(PeerConnectionTracker_OnSuspend, OnSuspend)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
 void PeerConnectionTracker::OnGetAllStats() {
   for (PeerConnectionIdMap::iterator it = peer_connection_id_map_.begin();
        it != peer_connection_id_map_.end(); ++it) {
 
     rtc::scoped_refptr<InternalStatsObserver> observer(
         new rtc::RefCountedObject<InternalStatsObserver>(it->second));
 
     it->first->GetStats(
         observer,
         NULL,
         webrtc::PeerConnectionInterface::kStatsOutputLevelDebug);
   }
 }
 
-void PeerConnectionTracker::OnSuspend() {
-  for (PeerConnectionIdMap::iterator it = peer_connection_id_map_.begin();
-       it != peer_connection_id_map_.end(); ++it) {
-    it->first->stop();
-  }
-}
-
 void PeerConnectionTracker::RegisterPeerConnection(
     RTCPeerConnectionHandler* pc_handler,
     const webrtc::PeerConnectionInterface::RTCConfiguration& config,
     const RTCMediaConstraints& constraints,
     const blink::WebFrame* frame) {
   DVLOG(1) << "PeerConnectionTracker::RegisterPeerConnection()";
   PeerConnectionInfo info;
 
   info.lid = GetNextLocalID();
   info.rtc_configuration =
@@ skipping 208 matching lines @@
     const std::string& value) {
   if (peer_connection_id_map_.find(pc_handler) == peer_connection_id_map_.end())
     return;
 
   RenderThreadImpl::current()->Send(
       new PeerConnectionTrackerHost_UpdatePeerConnection(
           peer_connection_id_map_[pc_handler], type, value));
 }
 
 }  // namespace content