x11: Remove X11 message-pump.

base/message_loop/message_pump_x11.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 BASE_MESSAGE_LOOP_MESSAGE_PUMP_X11_H
-#define BASE_MESSAGE_LOOP_MESSAGE_PUMP_X11_H
-
-#include <bitset>
-#include <map>
-
-#include "base/memory/scoped_ptr.h"
-#include "base/message_loop/message_pump.h"
-#include "base/message_loop/message_pump_glib.h"
-#include "base/observer_list.h"
-
-typedef struct _XDisplay Display;
-
-namespace base {
-
-// This class implements a message-pump for dispatching X events.
-class BASE_EXPORT MessagePumpX11 : public MessagePumpGlib {
- public:
-  MessagePumpX11();
-  virtual ~MessagePumpX11();
-
-  // Returns default X Display.
-  static Display* GetDefaultXDisplay();
-
-  // Returns the UI or GPU message pump.
-  static MessagePumpX11* Current();
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(MessagePumpX11);
-};
-
-#if !defined(TOOLKIT_GTK)
-typedef MessagePumpX11 MessagePumpForUI;
-#endif
-
-}  // namespace base
-
-#endif  // BASE_MESSAGE_LOOP_MESSAGE_PUMP_X11_H