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

ui/events/event.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 UI_EVENTS_EVENT_H_
 #define UI_EVENTS_EVENT_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 139 matching lines @@
       case ET_GESTURE_BEGIN:
       case ET_GESTURE_END:
       case ET_GESTURE_TWO_FINGER_TAP:
       case ET_GESTURE_PINCH_BEGIN:
       case ET_GESTURE_PINCH_END:
       case ET_GESTURE_PINCH_UPDATE:
       case ET_GESTURE_LONG_PRESS:
       case ET_GESTURE_LONG_TAP:
       case ET_GESTURE_SWIPE:
       case ET_GESTURE_SHOW_PRESS:
-      case ET_GESTURE_WIN8_EDGE_SWIPE:
         // When adding a gesture event which is paired with an event which
         // occurs earlier, add the event to |IsEndingEvent|.
         return true;
 
       case ET_SCROLL_FLING_CANCEL:
       case ET_SCROLL_FLING_START:
         // These can be ScrollEvents too. EF_FROM_TOUCH determines if they're
         // Gesture or Scroll events.
         return (flags_ & EF_FROM_TOUCH) == EF_FROM_TOUCH;
 
@@ skipping 860 matching lines @@
   // dispatched. This field gets a non-zero value only for gestures that are
   // released through TouchDispositionGestureFilter::SendGesture. The gesture
   // events that aren't fired directly in response to processing a touch-event
   // (e.g. timer fired ones), this id is zero. See crbug.com/618738.
   uint32_t unique_touch_event_id_;
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_EVENT_H_