Always use chromium threads for IO in remoting host

remoting/host/simple_host_process.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.
 //
 // This is an application of a minimal host process in a Chromoting
 // system. It serves the purpose of gluing different pieces together
 // to make a functional host process for testing.
 //
 // It peforms the following functionality:
 // 1. Connect to the GTalk network and register the machine as a host.
@@ skipping 199 matching lines @@
         .Append(UTF8ToWide(home_path))
         .Append(kDefaultConfigPath);
 #else
     std::string home_path;
     env->GetVar(base::env_vars::kHome, &home_path);
     return FilePath(home_path).Append(kDefaultConfigPath);
 #endif
   }
 
   void StartHost() {
-    signal_strategy_.reset(
-        new XmppSignalStrategy(context_.jingle_thread(), xmpp_login_,
-                               xmpp_auth_token_, xmpp_auth_service_));
+    signal_strategy_.reset(new XmppSignalStrategy(
+        context_.url_request_context_getter(),
+        xmpp_login_, xmpp_auth_token_, xmpp_auth_service_));
     signaling_connector_.reset(new SignalingConnector(
         signal_strategy_.get(),
         base::Bind(&SimpleHost::OnAuthFailed, base::Unretained(this))));
 
     if (fake_) {
       scoped_ptr<VideoFrameCapturer> capturer(new VideoFrameCapturerFake());
       scoped_ptr<EventExecutor> event_executor = EventExecutor::Create(
           context_.desktop_task_runner(),
           context_.ui_task_runner());
       scoped_ptr<AudioCapturer> audio_capturer(NULL);
@@ skipping 199 matching lines @@
         max_port < 0 || max_port > 65535) {
       LOG(ERROR) << "Invalid max-port value: " << max_port
                  << ". Expected integer in range [0, 65535].";
       return 1;
     }
     simple_host.network_settings()->max_port = max_port;
   }
 
   return simple_host.Run();
 }