exo: Fix multi-display hardware cursor

ash/shell.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_SHELL_H_
 #define ASH_SHELL_H_
 
 #include <memory>
 #include <utility>
 #include <vector>
@@ skipping 383 matching lines @@
   }
   ScreenshotController* screenshot_controller() {
     return screenshot_controller_.get();
   }
   MouseCursorEventFilter* mouse_cursor_filter() {
     return mouse_cursor_filter_.get();
   }
   EventTransformationHandler* event_transformation_handler() {
     return event_transformation_handler_.get();
   }
+  AshNativeCursorManager* native_cursor_manager() {
+    return native_cursor_manager_;
+  }
   ::wm::CursorManager* cursor_manager() { return cursor_manager_.get(); }
 
   SessionStateDelegate* session_state_delegate() {
     return session_state_delegate_.get();
   }
 
   HighContrastController* high_contrast_controller() {
     return high_contrast_controller_.get();
   }
 
@@ skipping 393 matching lines @@
   base::ObserverList<ShellObserver> shell_observers_;
 
   scoped_refptr<base::SequencedWorkerPool> blocking_pool_;
 
   DISALLOW_COPY_AND_ASSIGN(Shell);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_H_