mash: Remove ash::ShelfGestureHandler and ui::ET_GESTURE_WIN8_EDGE_SWIPE

ash/wm/gestures/shelf_gesture_handler.h

-// Copyright (c) 2012 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_WM_GESTURES_SHELF_GESTURE_HANDLER_H_
-#define ASH_WM_GESTURES_SHELF_GESTURE_HANDLER_H_
-
-#include "base/macros.h"
-
-namespace aura {
-class Window;
-}  // namespace aura
-
-namespace ui {
-class GestureEvent;
-}  // namespace ui
-
-namespace ash {
-
-// This manages gestures on the shelf (e.g. launcher, status tray) that affects
-// the shelf visibility.
-// TODO(jamescook): Consolidate this with ShelfLayoutManager and its notion of
-// drag status.
-class ShelfGestureHandler {
- public:
-  ShelfGestureHandler();
-  virtual ~ShelfGestureHandler();
-
-  // Processes a gesture event and updates the status of the shelf when
-  // appropriate. Returns true of the gesture has been handled and it should not
-  // be processed any farther, false otherwise.
-  // The caller must provide the |event_target_window| because the caller has
-  // knowledge of the type of the |event.target()| whether it's a |views::View|
-  // or an |aura::Window|.
-  bool ProcessGestureEvent(const ui::GestureEvent& event,
-                           const aura::Window* event_target_window);
-
- private:
-  bool drag_in_progress_;
-
-  DISALLOW_COPY_AND_ASSIGN(ShelfGestureHandler);
-};
-
-}  // namespace ash
-
-#endif  // ASH_WM_GESTURES_SHELF_GESTURE_HANDLER_H_