Cleanup after removing views-mus code

ash/mus/window_manager.h

 // Copyright 2015 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_MUS_WINDOW_MANAGER_H_
 #define ASH_MUS_WINDOW_MANAGER_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 15 matching lines @@
 
 namespace display {
 class Display;
 }
 
 namespace service_manager {
 class Connector;
 }
 
 namespace views {
-class PointerWatcherEventRouter2;
+class PointerWatcherEventRouter;
 }
 
 namespace wm {
 class FocusController;
 class WMState;
 }
 
 namespace ash {
 
 class EventClientImpl;
@@ skipping 134 matching lines @@
   display::mojom::DisplayControllerPtr display_controller_;
 
   std::unique_ptr<::wm::FocusController> focus_controller_;
   std::unique_ptr<::wm::WMState> wm_state_;
   std::unique_ptr<aura::PropertyConverter> property_converter_;
 
   std::unique_ptr<aura::WindowTreeClient> window_tree_client_;
 
   aura::WindowManagerClient* window_manager_client_ = nullptr;
 
-  std::unique_ptr<views::PointerWatcherEventRouter2>
+  std::unique_ptr<views::PointerWatcherEventRouter>
       pointer_watcher_event_router_;
 
   std::unique_ptr<ShadowController> shadow_controller_;
 
   RootWindowControllers root_window_controllers_;
 
   base::ObserverList<WindowManagerObserver> observers_;
 
   std::unique_ptr<ScreenMus> screen_;
 
   std::unique_ptr<WmShellMus> shell_;
 
   std::unique_ptr<WmLookupMus> lookup_;
 
   std::map<uint16_t, AcceleratorHandler*> accelerator_handlers_;
   uint16_t next_accelerator_namespace_id_ = 0u;
 
   std::unique_ptr<EventClientImpl> event_client_;
 
   std::unique_ptr<ScreenPositionController> screen_position_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowManager);
 };
 
 }  // namespace mus
 }  // namespace ash
 
 #endif  // ASH_MUS_WINDOW_MANAGER_H_