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

content/browser/android/content_view_core_impl.cc

Index: content/browser/android/content_view_core_impl.cc
diff --git a/content/browser/android/content_view_core_impl.cc b/content/browser/android/content_view_core_impl.cc
index c9a638ae84367bfe850fe334aa2a3678157e1ef8..4fda41f9e7b4a98539a24dd389feddeecd572dea 100644
--- a/content/browser/android/content_view_core_impl.cc
+++ b/content/browser/android/content_view_core_impl.cc
@@ -1041,8 +1041,9 @@ jboolean ContentViewCoreImpl::SendMouseWheelEvent(
     return false;
 
   // Compute Event.Latency.OS.MOUSE_WHEEL histogram.
-  base::TimeDelta current_time = ui::EventTimeForNow();
-  base::TimeDelta event_time = base::TimeDelta::FromMilliseconds(time_ms);
+  base::TimeTicks current_time = ui::EventTimeForNow();
+  base::TimeTicks event_time = base::TimeTicks() +
+      base::TimeDelta::FromMilliseconds(time_ms);
   base::TimeDelta delta = current_time - event_time;
   UMA_HISTOGRAM_CUSTOM_COUNTS("Event.Latency.OS.MOUSE_WHEEL",
       delta.InMicroseconds(), 1, 1000000, 50);