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

ash/shelf/shelf_view.cc

 // 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.
 
 #include "ash/shelf/shelf_view.h"
 
 #include <algorithm>
 #include <memory>
 
 #include "ash/common/ash_constants.h"
@@ skipping 1525 matching lines @@
   state->name = l10n_util::GetStringUTF16(IDS_ASH_SHELF_ACCESSIBLE_NAME);
 }
 
 void ShelfView::ViewHierarchyChanged(
     const ViewHierarchyChangedDetails& details) {
   if (details.is_add && details.child == this)
     tooltip_.Init();
 }
 
 void ShelfView::OnGestureEvent(ui::GestureEvent* event) {
-  aura::Window* target_window = static_cast<views::View*>(event->target())
-                                    ->GetWidget()
-                                    ->GetNativeWindow();
-  if (gesture_handler_.ProcessGestureEvent(*event, target_window))
+  if (wm_shelf_->ProcessGestureEvent(*event))
     event->StopPropagation();
 }
 
 void ShelfView::ShelfItemAdded(int model_index) {
   {
     base::AutoReset<bool> cancelling_drag(&cancelling_drag_model_changed_,
                                           true);
     model_index = CancelDrag(model_index);
   }
   views::View* view = CreateViewForItem(model_->items()[model_index]);
@@ skipping 356 matching lines @@
 
 int ShelfView::CalculateShelfDistance(const gfx::Point& coordinate) const {
   const gfx::Rect bounds = GetBoundsInScreen();
   int distance = shelf_->SelectValueForShelfAlignment(
       bounds.y() - coordinate.y(), coordinate.x() - bounds.right(),
       bounds.x() - coordinate.x());
   return distance > 0 ? distance : 0;
 }
 
 }  // namespace ash