Pointer watcher modifications to support laser pointer.

ash/pointer_watcher_delegate_aura.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.
 
+#include <map>
+
 #include "ash/ash_export.h"
 #include "ash/common/pointer_watcher_delegate.h"
 #include "base/macros.h"
 #include "base/observer_list.h"
 #include "ui/events/event_handler.h"
 
 namespace gfx {
 class Point;
 }
 
 namespace ui {
 class LocatedEvent;
 }
 
 namespace views {
 class Widget;
 }
 
 namespace ash {
 
 // Support for PointerWatchers in non-mus ash, implemented with a pre-target
 // EventHandler on the Shell.
 class ASH_EXPORT PointerWatcherDelegateAura : public PointerWatcherDelegate,
                                               public ui::EventHandler {
  public:
   PointerWatcherDelegateAura();
   ~PointerWatcherDelegateAura() override;
 
   // PointerWatcherDelegate:
-  void AddPointerWatcher(views::PointerWatcher* watcher) override;
+  void AddPointerWatcher(views::PointerWatcher* watcher,
+                         bool wants_moves = false) override;
   void RemovePointerWatcher(views::PointerWatcher* watcher) override;
 
   // ui::EventHandler:
   void OnMouseEvent(ui::MouseEvent* event) override;
   void OnTouchEvent(ui::TouchEvent* event) override;
 
  private:
   gfx::Point GetLocationInScreen(const ui::LocatedEvent& event) const;
   views::Widget* GetTargetWidget(const ui::LocatedEvent& event) const;
 
   // Must be empty on destruction.
   base::ObserverList<views::PointerWatcher, true> pointer_watchers_;
 
+  // Map stores the pointer watchers that want mouse move events.
+  std::map<views::PointerWatcher*, bool> wants_moves_map_;
+
   DISALLOW_COPY_AND_ASSIGN(PointerWatcherDelegateAura);
 };
 
 }  // namespace ash