Convert TrayEventFilter to wm common types

ash/mus/bridge/wm_shell_mus.h

 // Copyright 2016 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_BRIDGE_WM_SHELL_MUS_H_
 #define ASH_MUS_BRIDGE_WM_SHELL_MUS_H_
 
 #include <stdint.h>
 
 #include <vector>
@@ skipping 57 matching lines @@
   bool IsOverviewModeSelecting() override;
   bool IsOverviewModeRestoringMinimizedWindows() override;
   AccessibilityDelegate* GetAccessibilityDelegate() override;
   SessionStateDelegate* GetSessionStateDelegate() override;
   void AddActivationObserver(WmActivationObserver* observer) override;
   void RemoveActivationObserver(WmActivationObserver* observer) override;
   void AddDisplayObserver(WmDisplayObserver* observer) override;
   void RemoveDisplayObserver(WmDisplayObserver* observer) override;
   void AddShellObserver(ShellObserver* observer) override;
   void RemoveShellObserver(ShellObserver* observer) override;
+  void AddPointerWatcher(views::PointerWatcher* watcher) override;
+  void RemovePointerWatcher(views::PointerWatcher* watcher) override;
 #if defined(OS_CHROMEOS)
   void ToggleIgnoreExternalKeyboard() override;
 #endif
 
  private:
   // Returns true if |window| is a window that can have active children.
   static bool IsActivationParent(::mus::Window* window);
 
   void RemoveClientObserver();
 
@@ skipping 14 matching lines @@
 
   base::ObserverList<WmActivationObserver> activation_observers_;
 
   DISALLOW_COPY_AND_ASSIGN(WmShellMus);
 };
 
 }  // namespace mus
 }  // namespace ash
 
 #endif  // ASH_MUS_BRIDGE_WM_SHELL_MUS_H_