ash: Eliminate PointerWatcherDelegate

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 "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;
-class PointerEvent;
-}
-
-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,
-                         bool wants_moves) 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;
-
-  // 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_;
-
-  DISALLOW_COPY_AND_ASSIGN(PointerWatcherDelegateAura);
-};
-
-}  // namespace ash