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

ash/wm/system_gesture_event_filter.cc

Index: ash/wm/system_gesture_event_filter.cc
diff --git a/ash/wm/system_gesture_event_filter.cc b/ash/wm/system_gesture_event_filter.cc
index 4cd988464696c917bdba508db91feaf9765c29b0..43132f6f6723ad8fe2935a8d69f27ca692a6dddd 100644
--- a/ash/wm/system_gesture_event_filter.cc
+++ b/ash/wm/system_gesture_event_filter.cc
@@ -9,7 +9,6 @@
 #include "ash/shell.h"
 #include "ash/touch/touch_uma.h"
 #include "ash/wm/gestures/overview_gesture_handler.h"
-#include "ash/wm/gestures/shelf_gesture_handler.h"
 #include "ui/base/touch/touch_device.h"
 #include "ui/events/event.h"
 #include "ui/events/event_constants.h"
@@ -17,8 +16,7 @@
 namespace ash {
 
 SystemGestureEventFilter::SystemGestureEventFilter()
-    : overview_gesture_handler_(new OverviewGestureHandler),
-      shelf_gesture_handler_(new ShelfGestureHandler()) {}
+    : overview_gesture_handler_(new OverviewGestureHandler) {}
 
 SystemGestureEventFilter::~SystemGestureEventFilter() {}
 
@@ -47,13 +45,6 @@ void SystemGestureEventFilter::OnTouchEvent(ui::TouchEvent* event) {
 void SystemGestureEventFilter::OnGestureEvent(ui::GestureEvent* event) {
   aura::Window* target = static_cast<aura::Window*>(event->target());
   ash::TouchUMA::GetInstance()->RecordGestureEvent(target, *event);
-
-  if (event->type() == ui::ET_GESTURE_WIN8_EDGE_SWIPE &&
-      shelf_gesture_handler_->ProcessGestureEvent(*event, target)) {
-    // Do not stop propagation, since the immersive fullscreen controller may
-    // need to handle this event.
-    return;
-  }
 }
 
 }  // namespace ash