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

ash/test/shell_test_api.cc

 // 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.
 
 #include "ash/test/shell_test_api.h"
 
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
 
 namespace ash {
@@ skipping 17 matching lines @@
 
 internal::WorkspaceController* ShellTestApi::workspace_controller() {
   return shell_->GetPrimaryRootWindowController()->workspace_controller();
 }
 
 internal::ScreenPositionController*
 ShellTestApi::screen_position_controller() {
   return shell_->screen_position_controller_.get();
 }
 
+AshNativeCursorManager* ShellTestApi::ash_native_cursor_manager() {
+  return shell_->native_cursor_manager_;
+}
+
 LauncherModel* ShellTestApi::launcher_model() {
   return shell_->launcher_model_.get();
 }
 
 }  // namespace test
 }  // namespace ash