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 4b9ca78c755a973994e19c47c21dad60f8b06bbf..d01f5f1b656bc8e031c2c9b029fd437b5e40a1ea 100644
--- a/ui/views/controls/button/custom_button_unittest.cc
+++ b/ui/views/controls/button/custom_button_unittest.cc
@@ -333,8 +333,7 @@ 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);
 }