Remove calls to deprecated MessageLoop methods in remoting.

remoting/host/setup/start_host_main.cc

Index: remoting/host/setup/start_host_main.cc
diff --git a/remoting/host/setup/start_host_main.cc b/remoting/host/setup/start_host_main.cc
index 9a87abb3f6efcf84f3769f65b5af5f5494d4b580..5f3462cd408eceb12e2a8768e942ccd66b384ced 100644
--- a/remoting/host/setup/start_host_main.cc
+++ b/remoting/host/setup/start_host_main.cc
@@ -88,7 +88,8 @@ std::string ReadString(bool no_echo) {
 // Called when the HostStarter has finished.
 void OnDone(HostStarter::Result result) {
   if (!g_message_loop->task_runner()->BelongsToCurrentThread()) {
-    g_message_loop->PostTask(FROM_HERE, base::Bind(&OnDone, result));
+    g_message_loop->task_runner()->PostTask(FROM_HERE,
+                                            base::Bind(&OnDone, result));
     return;
   }
   switch (result) {