Use TaskScheduler instead of PostTask in P2PSocketDispatcherHost.

content/browser/renderer_host/p2p/socket_dispatcher_host.h

 // 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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_P2P_SOCKET_DISPATCHER_HOST_H_
 #define CONTENT_BROWSER_RENDERER_HOST_P2P_SOCKET_DISPATCHER_HOST_H_
 
 #include <stdint.h>
 
 #include <map>
 #include <memory>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
+#include "base/sequenced_task_runner.h"
 #include "content/browser/renderer_host/p2p/socket_host_throttler.h"
 #include "content/common/p2p_socket_type.h"
 #include "content/public/browser/browser_message_filter.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_process_host.h"
 #include "net/base/ip_address.h"
 #include "net/base/ip_endpoint.h"
 #include "net/base/network_change_notifier.h"
 
 namespace net {
@@ skipping 92 matching lines @@
   std::set<std::unique_ptr<DnsRequest>> dns_requests_;
   P2PMessageThrottler throttler_;
 
   net::IPAddress default_ipv4_local_address_;
   net::IPAddress default_ipv6_local_address_;
 
   bool dump_incoming_rtp_packet_;
   bool dump_outgoing_rtp_packet_;
   RenderProcessHost::WebRtcRtpPacketCallback packet_callback_;
 
+  // Used to call DoGetNetworkList, which may briefly block since getting the
+  // default local address involves creating a dummy socket.
+  const scoped_refptr<base::SequencedTaskRunner> network_list_task_runner_;
+
   DISALLOW_COPY_AND_ASSIGN(P2PSocketDispatcherHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_P2P_SOCKET_DISPATCHER_HOST_H_