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

ui/views/corewm/native_cursor_manager_delegate.h

+// Copyright (c) 2013 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_COREWM_NATIVE_CURSOR_MANAGER_DELEGATE_H_
+#define UI_VIEWS_COREWM_NATIVE_CURSOR_MANAGER_DELEGATE_H_
+
+#include "ui/gfx/native_widget_types.h"
+#include "ui/views/views_export.h"
+
+namespace views {
+namespace corewm {
+
+// The non-public interface that CursorManager exposes to its users. This
+// gives accessors to all the current state, and mutators to all the current
+// state.
+class VIEWS_EXPORT NativeCursorManagerDelegate {
+ public:
+  virtual ~NativeCursorManagerDelegate() {}
+
+  virtual gfx::NativeCursor GetCurrentCursor() const = 0;
+  virtual bool GetCurrentVisibility() const = 0;
+  virtual bool GetMouseEventsEnabled() const = 0;
+
+  virtual void CommitCursor(gfx::NativeCursor cursor) = 0;
+  virtual void CommitVisibility(bool visible) = 0;
+  virtual void CommitMouseEventsEnabled(bool enabled) = 0;
+};
+
+}  // namespace corewm
+}  // namespace views
+
+#endif  // UI_VIEWS_COREWM_NATIVE_CURSOR_MANAGER_DELEGATE_H_