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

ui/events/test/event_generator.h

Index: ui/events/test/event_generator.h
diff --git a/ui/events/test/event_generator.h b/ui/events/test/event_generator.h
index a05a37937790a9faeb90cc8d2dc7b8018b612018..94b5b8634e1b3e1e15b4a700f9518fcc5c41d61c 100644
--- a/ui/events/test/event_generator.h
+++ b/ui/events/test/event_generator.h
@@ -254,11 +254,6 @@ class EventGenerator {
   // to the center of the window.
   void PressMoveAndReleaseTouchToCenterOf(EventTarget* window);
 
-  // Generates and dispatches a Win8 edge-swipe event (swipe up from bottom or
-  // swipe down from top).  Note that it is not possible to distinguish between
-  // the two edges with this event.
-  void GestureEdgeSwipe();
-
   // Generates and dispatches touch-events required to generate a TAP gesture.
   // Note that this can generate a number of other gesture events at the same
   // time (e.g. GESTURE_BEGIN, TAP_DOWN, END).