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

base/message_loop.h

 // Copyright (c) 2011 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 BASE_MESSAGE_LOOP_H_
 #define BASE_MESSAGE_LOOP_H_
 #pragma once
 
 #include <queue>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/message_pump.h"
 #include "base/observer_list.h"
 #include "base/ref_counted.h"
 #include "base/synchronization/lock.h"
 #include "base/task.h"
 
 #if defined(OS_WIN)
 // We need this to declare base::MessagePumpWin::Dispatcher, which we should
 // really just eliminate.
 #include "base/message_pump_win.h"
 #elif defined(OS_POSIX)
 #include "base/message_pump_libevent.h"
 #if !defined(OS_MACOSX)
 #include "base/message_pump_glib.h"
+typedef struct _XDisplay Display;
 #endif
 #endif
 #if defined(TOUCH_UI)
 #include "base/message_pump_glib_x_dispatch.h"
 #endif
 
 namespace base {
 class Histogram;
 }
 
@@ skipping 464 matching lines @@
   static MessageLoopForUI* current() {
     MessageLoop* loop = MessageLoop::current();
     DCHECK_EQ(MessageLoop::TYPE_UI, loop->type());
     return static_cast<MessageLoopForUI*>(loop);
   }
 
 #if defined(OS_WIN)
   void DidProcessMessage(const MSG& message);
 #endif  // defined(OS_WIN)
 
+#if defined(OS_POSIX) && !defined(OS_MACOSX)
+  Display* get_display();
+#endif
+
 #if !defined(OS_MACOSX)
   // Please see message_pump_win/message_pump_glib for definitions of these
   // methods.
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
   void Run(Dispatcher* dispatcher);
 
  protected:
   // TODO(rvargas): Make this platform independent.
   base::MessagePumpForUI* pump_ui() {
@@ skipping 79 matching lines @@
 #endif  // defined(OS_POSIX)
 };
 
 // Do not add any member variables to MessageLoopForIO!  This is important b/c
 // MessageLoopForIO is often allocated via MessageLoop(TYPE_IO).  Any extra
 // data that you need should be stored on the MessageLoop's pump_ instance.
 COMPILE_ASSERT(sizeof(MessageLoop) == sizeof(MessageLoopForIO),
                MessageLoopForIO_should_not_have_extra_member_variables);
 
 #endif  // BASE_MESSAGE_LOOP_H_