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

ash/common/system/status_area_widget_delegate.cc

Index: ash/common/system/status_area_widget_delegate.cc
diff --git a/ash/common/system/status_area_widget_delegate.cc b/ash/common/system/status_area_widget_delegate.cc
index d749273d18780a3cbacab8d04e3ee510ec2539f2..3674f34673271e8371d642bcd6df041a54143d1d 100644
--- a/ash/common/system/status_area_widget_delegate.cc
+++ b/ash/common/system/status_area_widget_delegate.cc
@@ -86,7 +86,7 @@ void StatusAreaWidgetDelegate::OnGestureEvent(ui::GestureEvent* event) {
       static_cast<views::View*>(event->target())->GetWidget();
   WmWindow* target_window = WmLookup::Get()->GetWindowForWidget(target_widget);
   WmShelf* shelf = target_window->GetRootWindowController()->GetShelf();
-  if (shelf->ProcessGestureEvent(*event, target_window))
+  if (shelf->ProcessGestureEvent(*event))
     event->StopPropagation();
   else
     views::AccessiblePaneView::OnGestureEvent(event);