Wires up drags to pointer watcher adapter.

ash/aura/pointer_watcher_adapter.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_AURA_POINTER_WATCHER_ADAPTER_H_
 #define ASH_AURA_POINTER_WATCHER_ADAPTER_H_
 
 #include "ash/ash_export.h"
 #include "base/macros.h"
 #include "base/observer_list.h"
 #include "ui/events/event_handler.h"
 
 namespace gfx {
 class Point;
 }
 
 namespace ui {
 class LocatedEvent;
 class PointerEvent;
 }
 
 namespace views {
 class PointerWatcher;
+enum class PointerWatcherEventTypes;
 class Widget;
 }
 
 namespace ash {
 
 // Support for PointerWatchers in non-mus ash, implemented with a pre-target
 // EventHandler on the Shell.
 class ASH_EXPORT PointerWatcherAdapter : public ui::EventHandler {
  public:
   PointerWatcherAdapter();
   ~PointerWatcherAdapter() override;
 
   // See WmShell::AddPointerWatcher() for details.
-  void AddPointerWatcher(views::PointerWatcher* watcher, bool wants_moves);
+  void AddPointerWatcher(views::PointerWatcher* watcher,
+                         views::PointerWatcherEventTypes events);
   void RemovePointerWatcher(views::PointerWatcher* watcher);
 
   // 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;
 
   // Calls OnPointerEventObserved() on the appropriate set of watchers as
   // determined by the type of event. |original_event| is the original
   // event supplied to OnMouseEvent()/OnTouchEvent(), |pointer_event| is
   // |original_event| converted to a PointerEvent.
   void NotifyWatchers(const ui::PointerEvent& pointer_event,
                       const ui::LocatedEvent& original_event);
 
   // The true parameter to ObserverList indicates the list must be empty on
   // destruction. Two sets of observers are maintained, one for observers not
   // needing moves |non_move_watchers_| and |move_watchers_| for those
   // observers wanting moves too.
   base::ObserverList<views::PointerWatcher, true> non_move_watchers_;
   base::ObserverList<views::PointerWatcher, true> move_watchers_;
+  base::ObserverList<views::PointerWatcher, true> drag_watchers_;
 
   DISALLOW_COPY_AND_ASSIGN(PointerWatcherAdapter);
 };
 
 }  // namespace ash
 
 #endif  // ASH_AURA_POINTER_WATCHER_ADAPTER_H_