Rework ash::CursorManager into a corewm object, to share code with desktop.

ui/views/widget/desktop_aura/desktop_cursor_client.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_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_CURSOR_CLIENT_H_
-#define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_CURSOR_CLIENT_H_
-
-#include "base/compiler_specific.h"
-#include "base/memory/scoped_ptr.h"
-#include "ui/aura/client/cursor_client.h"
-#include "ui/views/views_export.h"
-
-namespace aura {
-class RootWindow;
-}
-
-namespace ui {
-class CursorLoader;
-}
-
-namespace views {
-
-// A CursorClient that interacts with only one RootWindow. (Unlike the one in
-// ash, which interacts with all the RootWindows.)
-class VIEWS_EXPORT DesktopCursorClient : public aura::client::CursorClient {
- public:
-  explicit DesktopCursorClient(aura::RootWindow* window);
-  virtual ~DesktopCursorClient();
-
-  // Overridden from client::CursorClient:
-  virtual void SetCursor(gfx::NativeCursor cursor) OVERRIDE;
-  virtual void ShowCursor() OVERRIDE;
-  virtual void HideCursor() OVERRIDE;
-  virtual bool IsCursorVisible() const OVERRIDE;
-  virtual void EnableMouseEvents() OVERRIDE;
-  virtual void DisableMouseEvents() OVERRIDE;
-  virtual bool IsMouseEventsEnabled() const OVERRIDE;
-  virtual void SetDeviceScaleFactor(float device_scale_factor) OVERRIDE;
-  virtual void LockCursor() OVERRIDE;
-  virtual void UnlockCursor() OVERRIDE;
-
- private:
-  void SetCursorVisibility(bool visible);
-
-  aura::RootWindow* root_window_;
-  scoped_ptr<ui::CursorLoader> cursor_loader_;
-
-  gfx::NativeCursor current_cursor_;
-  bool cursor_visible_;
-
-  DISALLOW_COPY_AND_ASSIGN(DesktopCursorClient);
-};
-
-}  // namespace views
-
-#endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_CURSOR_CLIENT_H_