Let TRACE_EVENT_XXX_WITH_TIMESTAMP accept TimeTicks instead of int64_t

ui/events/latency_info.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/events/latency_info.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <string>
@@ skipping 225 matching lines @@
     CHECK_EQ(-1, trace_id_);
     trace_id_ = component_sequence_number;
 
     if (*latency_info_enabled) {
       // The timestamp for ASYNC_BEGIN trace event is used for drawing the
       // beginning of the trace event in trace viewer. For better visualization,
       // for an input event, we want to draw the beginning as when the event is
       // 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) {
         if (IsInputLatencyBeginComponent(component))
           trace_name_ = std::string("InputLatency::") + trace_name_str;
         else
           trace_name_ = std::string("Latency::") + trace_name_str;
       }
 
       TRACE_EVENT_COPY_ASYNC_BEGIN_WITH_TIMESTAMP0(
@@ skipping 106 matching lines @@
 }
 
 bool LatencyInfo::AddInputCoordinate(const gfx::PointF& input_coordinate) {
   if (input_coordinates_size_ >= kMaxInputCoordinates)
     return false;
   input_coordinates_[input_coordinates_size_++] = input_coordinate;
   return true;
 }
 
 }  // namespace ui