Revert, causing browser crashes due to race

content/renderer/media/peer_connection_tracker.cc

Index: content/renderer/media/peer_connection_tracker.cc
diff --git a/content/renderer/media/peer_connection_tracker.cc b/content/renderer/media/peer_connection_tracker.cc
index 5476f115bcb7b2093fe5801dafb61cc36da4333f..5aac78c3fd50bceb41dfbdc590b656b7862295d2 100644
--- a/content/renderer/media/peer_connection_tracker.cc
+++ b/content/renderer/media/peer_connection_tracker.cc
@@ -278,7 +278,6 @@ bool PeerConnectionTracker::OnControlMessageReceived(
   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;
@@ -298,13 +297,6 @@ void PeerConnectionTracker::OnGetAllStats() {
   }
 }
 
-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,