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

ui/views/controls/button/custom_button_unittest.cc

Index: ui/views/controls/button/custom_button_unittest.cc
diff --git a/ui/views/controls/button/custom_button_unittest.cc b/ui/views/controls/button/custom_button_unittest.cc
index b9ca9712d47bf29654fae6782f5c7d26a4ee4d2b..c7ea38bb8afbe2fd35bb161d9ec9af9453f5d938 100644
--- a/ui/views/controls/button/custom_button_unittest.cc
+++ b/ui/views/controls/button/custom_button_unittest.cc
@@ -288,8 +288,7 @@ namespace {
 
 void PerformGesture(CustomButton* button, ui::EventType event_type) {
   ui::GestureEventDetails gesture_details(event_type);
-  base::TimeDelta time_stamp = base::TimeDelta::FromMicroseconds(0);
-  ui::GestureEvent gesture_event(0, 0, 0, time_stamp, gesture_details);
+  ui::GestureEvent gesture_event(0, 0, 0, base::TimeTicks(), gesture_details);
   button->OnGestureEvent(&gesture_event);
 }