Move DisplayManager and DisplayChangeObserverX11 from aura to ash.

ui/aura/single_display_manager.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_SINGLE_DISPLAY_MANAGER_H_
-#define UI_AURA_SINGLE_DISPLAY_MANAGER_H_
-
-#include "base/compiler_specific.h"
-#include "ui/aura/aura_export.h"
-#include "ui/aura/display_manager.h"
-#include "ui/aura/window_observer.h"
-#include "ui/gfx/display.h"
-
-namespace gfx {
-class Rect;
-}
-
-namespace aura {
-
-// A display manager assuming there is one display.
-class AURA_EXPORT SingleDisplayManager : public DisplayManager,
-                                         public WindowObserver {
- public:
-  SingleDisplayManager();
-  virtual ~SingleDisplayManager();
-
-  // DisplayManager overrides:
-  virtual void OnNativeDisplaysChanged(
-      const std::vector<gfx::Display>& display) OVERRIDE;
-  virtual RootWindow* CreateRootWindowForDisplay(
-      const gfx::Display& display) OVERRIDE;
-  virtual gfx::Display* GetDisplayAt(size_t index) OVERRIDE;
-
-  virtual size_t GetNumDisplays() const OVERRIDE;
-
-  virtual const gfx::Display& GetDisplayNearestWindow(
-      const Window* window) const OVERRIDE;
-  virtual const gfx::Display& GetDisplayNearestPoint(
-      const gfx::Point& point) const OVERRIDE;
-  virtual const gfx::Display& GetDisplayMatching(
-      const gfx::Rect& match_rect) const OVERRIDE;
-  virtual std::string GetDisplayNameFor(const gfx::Display& display) OVERRIDE;
-
-  // WindowObserver overrides:
-  virtual void OnWindowBoundsChanged(Window* window,
-                                     const gfx::Rect& old_bounds,
-                                     const gfx::Rect& new_bounds) OVERRIDE;
-  virtual void OnWindowDestroying(Window* window) OVERRIDE;
-
- private:
-  void Init();
-  void Update(const gfx::Size size);
-
-  RootWindow* root_window_;
-  gfx::Display display_;
-
-  DISALLOW_COPY_AND_ASSIGN(SingleDisplayManager);
-};
-
-}  // namespace aura
-
-#endif  // UI_AURA_SINGLE_DISPLAY_MANAGER_H_