Pointer watcher modifications to support laser pointer.

ash/common/pointer_watcher_delegate.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_COMMON_POINTER_WATCHER_DELEGATE_H_
 #define ASH_COMMON_POINTER_WATCHER_DELEGATE_H_
 
 #include "ash/ash_export.h"
 
 namespace views {
 class PointerWatcher;
 }
 
 namespace ash {
 
 // Allows different implementations of PointerWatcher in mus and non-mus ash.
 class ASH_EXPORT PointerWatcherDelegate {
  public:
   virtual ~PointerWatcherDelegate() {}
 
-  virtual void AddPointerWatcher(views::PointerWatcher* watcher) = 0;
+  virtual void AddPointerWatcher(views::PointerWatcher* watcher,
+                                 bool wants_moves = false) = 0;
   virtual void RemovePointerWatcher(views::PointerWatcher* watcher) = 0;
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_POINTER_WATCHER_DELEGATE_H_