Move DisplayManager and DisplayChangeObserverX11 from aura to ash.

ui/aura/display_change_observer_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 UI_AURA_DISPLAY_CHANGE_OBSERVER_X11_H
-#define UI_AURA_DISPLAY_CHANGE_OBSERVER_X11_H
-
-#include <X11/Xlib.h>
-
-// Xlib.h defines RootWindow.
-#undef RootWindow
-
-#include "base/basictypes.h"
-#include "base/message_loop.h"
-
-namespace aura {
-namespace internal {
-
-// An object that observes changes in display configuration and
-// update DisplayManagers.
-class DisplayChangeObserverX11 : public MessageLoop::Dispatcher {
- public:
-  DisplayChangeObserverX11();
-  virtual ~DisplayChangeObserverX11();
-
-  // Overridden from Dispatcher overrides:
-  virtual bool Dispatch(const base::NativeEvent& xev) OVERRIDE;
-
-  // Reads display configurations from the system and notifies
-  // |display_manager_| about the change.
-  void NotifyDisplayChange();
-
- private:
-  Display* xdisplay_;
-
-  ::Window x_root_window_;
-
-  int xrandr_event_base_;
-
-  DISALLOW_COPY_AND_ASSIGN(DisplayChangeObserverX11);
-};
-
-}  // namespace internal
-}  // namespace aura
-
-#endif  // UI_AURA_DISPLAY_CHANGE_OBSERVER_X11_H