Move ash specific cursor code to CursorManager.

ash/wm/image_cursors.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 ASH_WM_IMAGE_CURSORS_H_
+#define ASH_WM_IMAGE_CURSORS_H_
+
+#include "ash/ash_export.h"
+#include "base/memory/scoped_ptr.h"
+#include "ui/gfx/native_widget_types.h"
+
+namespace ui {
+class CursorLoader;
+}
+
+namespace ash {
+
+// A utility class that provides cursors for NativeCursors for which we have
+// image resources.
+class ASH_EXPORT ImageCursors {
+ public:
+  ImageCursors();
+  ~ImageCursors();
+
+  // Returns the device scale factor of cursors.
+  float GetDeviceScaleFactor() const;
+
+  // Sets the device scale factor of the cursors with |device_scale_factor| and
+  // reloads the cursor images if necessary.
+  void SetDeviceScaleFactor(float device_scale_factor);
+
+  // Sets the platform cursor based on the native type of |cursor|.
+  void SetPlatformCursor(gfx::NativeCursor* cursor);
+
+ private:
+  scoped_ptr<ui::CursorLoader> cursor_loader_;
+
+  DISALLOW_COPY_AND_ASSIGN(ImageCursors);
+};
+
+}  // namespace ash
+
+#endif  // ASH_WM_IMAGE_CURSORS_H_