Pass FROM_HERE to ObserverListThreadSafe::Notify to improve profile.

content/renderer/p2p/socket_dispatcher.cc

 // Copyright (c) 2012 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/p2p/socket_dispatcher.h"
 
 #include "base/bind.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "content/child/child_process.h"
@@ skipping 105 matching lines @@
 }
 
 void P2PSocketDispatcher::UnregisterHostAddressRequest(int id) {
   DCHECK(message_loop_->BelongsToCurrentThread());
   host_address_requests_.Remove(id);
 }
 
 void P2PSocketDispatcher::OnNetworkListChanged(
     const net::NetworkInterfaceList& networks) {
   network_list_observers_->Notify(
-      &NetworkListObserver::OnNetworkListChanged, networks);
+      FROM_HERE, &NetworkListObserver::OnNetworkListChanged, networks);
 }
 
 void P2PSocketDispatcher::OnGetHostAddressResult(
     int32 request_id,
     const net::IPAddressList& addresses) {
   P2PAsyncAddressResolver* request = host_address_requests_.Lookup(request_id);
   if (!request) {
     DVLOG(1) << "Received P2P message for socket that doesn't exist.";
     return;
   }
@@ skipping 52 matching lines @@
     // hasn't processed the close message by the time it sends the
     // message to the renderer.
     DVLOG(1) << "Received P2P message for socket that doesn't exist.";
     return NULL;
   }
 
   return client;
 }
 
 }  // namespace content