Let TRACE_EVENT_XXX_WITH_TIMESTAMP accept TimeTicks instead of int64_t

ui/events/latency_info.cc

Index: ui/events/latency_info.cc
diff --git a/ui/events/latency_info.cc b/ui/events/latency_info.cc
index 4ef3d9c6fb1e3ae53118085b6dd9517d9a1e7cbf..fcad232fa7d343fbdf6343b9de0ac8154a415c47 100644
--- a/ui/events/latency_info.cc
+++ b/ui/events/latency_info.cc
@@ -243,16 +243,16 @@ void LatencyInfo::AddLatencyNumberWithTimestampImpl(
       // originally created, e.g. the timestamp of its ORIGINAL/UI_COMPONENT,
       // not when we actually issue the ASYNC_BEGIN trace event.
       LatencyComponent begin_component;
-      int64_t ts = 0;
+      base::TimeTicks ts;
       if (FindLatency(INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT,
                       0,
                       &begin_component) ||
           FindLatency(INPUT_EVENT_LATENCY_UI_COMPONENT,
                       0,
                       &begin_component)) {
-        ts = begin_component.event_time.ToInternalValue();
+        ts = begin_component.event_time;
       } else {
-        ts = base::TimeTicks::Now().ToInternalValue();
+        ts = base::TimeTicks::Now();
       }
 
       if (trace_name_str) {