Run event executor on the ui thread to remove the need to explicitly XFlush() the XTest calls.

remoting/host/simple_host_process.cc

 // Copyright (c) 2010 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 60 matching lines @@
   // Needed for the Mac, so we don't leak objects when threads are created.
   base::mac::ScopedNSAutoreleasePool pool;
 
   CommandLine::Init(argc, argv);
   const CommandLine* cmd_line = CommandLine::ForCurrentProcess();
 
   base::AtExitManager exit_manager;
   base::EnsureNSPRInit();
 
   // Allocate a chromoting context and starts it.
-  remoting::ChromotingHostContext context;
+  MessageLoop message_loop(MessageLoop::TYPE_UI);
+  remoting::ChromotingHostContext context(&message_loop);
   context.Start();
 
 
 #if defined(OS_WIN)
   wstring home_path = GetEnvironmentVar(kHomeDrive);
   home_path += GetEnvironmentVar(kHomePath);
 #else
   string home_path = GetEnvironmentVar(base::env_vars::kHome);
 #endif
   FilePath config_path(home_path);
@@ skipping 56 matching lines @@
       LOG(ERROR) << "Unknown video codec: " << video_codec;
       context.Stop();
       return 1;
     }
     config->mutable_video_configs()->push_back(ChannelConfig(
         transport, remoting::protocol::kDefaultStreamVersion, codec));
     host->set_protocol_config(config.release());
   }
 
   // Let the chromoting host run until the shutdown task is executed.
-  MessageLoop message_loop(MessageLoop::TYPE_UI);
   host->Start(NewRunnableFunction(&ShutdownTask, &message_loop));
   message_loop.Run();
 
   // And then stop the chromoting context.
   context.Stop();
   file_io_thread.Stop();
   return 0;
 }