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

ui/events/gesture_detection/gesture_touch_uma_histogram.cc

 // Copyright 2014 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 "ui/events/gesture_detection/gesture_touch_uma_histogram.h"
 
 #include "base/metrics/histogram.h"
 
 namespace ui {
 
@@ skipping 101 matching lines @@
     case ET_GESTURE_SWIPE: {
       int touch_points = gesture.details.touch_points();
       if (touch_points == 1)
         return UMA_ET_GESTURE_SWIPE_1;
       else if (touch_points == 2)
         return UMA_ET_GESTURE_SWIPE_2;
       else if (touch_points == 3)
         return UMA_ET_GESTURE_SWIPE_3;
       return UMA_ET_GESTURE_SWIPE_4P;
     }
-    case ET_GESTURE_WIN8_EDGE_SWIPE:
-      return UMA_ET_GESTURE_WIN8_EDGE_SWIPE;
     case ET_GESTURE_TAP_CANCEL:
       return UMA_ET_GESTURE_TAP_CANCEL;
     case ET_GESTURE_SHOW_PRESS:
       return UMA_ET_GESTURE_SHOW_PRESS;
     case ET_SCROLL:
       return UMA_ET_SCROLL;
     case ET_SCROLL_FLING_START:
       return UMA_ET_SCROLL_FLING_START;
     case ET_SCROLL_FLING_CANCEL:
       return UMA_ET_SCROLL_FLING_CANCEL;
     case ET_GESTURE_TAP_UNCONFIRMED:
       return UMA_ET_GESTURE_TAP_UNCONFIRMED;
     case ET_GESTURE_DOUBLE_TAP:
       return UMA_ET_GESTURE_DOUBLE_TAP;
     default:
       NOTREACHED();
       return UMA_ET_UNKNOWN;
   }
 }
 
 }  //  namespace ui