Change ui::Event::time_stamp from TimeDelta to TimeTicks

ui/events/gestures/gesture_provider_aura.cc

Index: ui/events/gestures/gesture_provider_aura.cc
diff --git a/ui/events/gestures/gesture_provider_aura.cc b/ui/events/gestures/gesture_provider_aura.cc
index 3d0e9da50b28bbaad761bb809f03494d4325f417..86516b9fc43deb2bc2ed67563281c18d8faa6177 100644
--- a/ui/events/gestures/gesture_provider_aura.cc
+++ b/ui/events/gestures/gesture_provider_aura.cc
@@ -51,9 +51,8 @@ void GestureProviderAura::OnTouchEventAck(uint32_t unique_event_id,
 
 void GestureProviderAura::OnGestureEvent(
     const GestureEventData& gesture) {
-  std::unique_ptr<ui::GestureEvent> event(
-      new ui::GestureEvent(gesture.x, gesture.y, gesture.flags,
-                           gesture.time - base::TimeTicks(), gesture.details));
+  std::unique_ptr<ui::GestureEvent> event(new ui::GestureEvent(
+      gesture.x, gesture.y, gesture.flags, gesture.time, gesture.details));
 
   if (!handling_event_) {
     // Dispatching event caused by timer.