Make the cursor have separate mode for disabled mouse events and invisible.

ash/test/cursor_manager_test_api.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_TEST_CURSOR_MANAGER_TEST_API_H_
 #define ASH_TEST_CURSOR_MANAGER_TEST_API_H_
 
 #include "base/basictypes.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace ash {
 
 class CursorManager;
 
 namespace test {
 
 // Use the api in this class to test CursorManager.
 class CursorManagerTestApi {
  public:
   explicit CursorManagerTestApi(CursorManager* cursor_manager);
   ~CursorManagerTestApi();
 
-  gfx::NativeCursor GetCurrentCursor();
-  float GetDeviceScaleFactor();
+  gfx::NativeCursor GetCurrentCursor() const;
+  float GetDeviceScaleFactor() const;
 
  private:
   CursorManager* cursor_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(CursorManagerTestApi);
 };
 
 }  // namespace test
 }  // namespace ash
 
 #endif  // ASH_TEST_CURSOR_MANAGER_TEST_API_H_