LatencyInfo trace_id_ no longer dependent on sequence_number.

ui/latency/latency_info_unittest.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/latency/latency_info.h"
 
 #include <stddef.h>
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace ui {
 
 TEST(LatencyInfoTest, AddTwoSeparateEvent) {
   LatencyInfo info;
+  info.set_trace_id(1);
+  EXPECT_FALSE(info.began());
   info.AddLatencyNumberWithTimestamp(INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
                                      0,
                                      1,
                                      base::TimeTicks::FromInternalValue(100),
                                      1);
+  EXPECT_TRUE(info.began());
   info.AddLatencyNumberWithTimestamp(INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT,
                                      1,
                                      5,
                                      base::TimeTicks::FromInternalValue(1000),
                                      2);
 
   EXPECT_EQ(info.latency_components().size(), 2u);
   LatencyInfo::LatencyComponent component;
   EXPECT_FALSE(
       info.FindLatency(INPUT_EVENT_LATENCY_UI_COMPONENT, 0, &component));
   EXPECT_FALSE(
       info.FindLatency(INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT, 1, &component));
   EXPECT_TRUE(
       info.FindLatency(INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT, 0, &component));
   EXPECT_EQ(component.sequence_number, 1);
   EXPECT_EQ(component.event_count, 1u);
   EXPECT_EQ(component.event_time.ToInternalValue(), 100);
   EXPECT_TRUE(
       info.FindLatency(INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT, 1, &component));
   EXPECT_EQ(component.sequence_number, 5);
   EXPECT_EQ(component.event_count, 2u);
   EXPECT_EQ(component.event_time.ToInternalValue(), 1000);
 }
 
 TEST(LatencyInfoTest, AddTwoSameEvent) {
   LatencyInfo info;
+  info.set_trace_id(1);
   info.AddLatencyNumberWithTimestamp(INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT,
                                      0,
                                      30,
                                      base::TimeTicks::FromInternalValue(100),
                                      2);
   info.AddLatencyNumberWithTimestamp(INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT,
                                      0,
                                      13,
                                      base::TimeTicks::FromInternalValue(200),
                                      3);
 
   EXPECT_EQ(info.latency_components().size(), 1u);
   LatencyInfo::LatencyComponent component;
   EXPECT_FALSE(
       info.FindLatency(INPUT_EVENT_LATENCY_UI_COMPONENT, 0, &component));
   EXPECT_FALSE(
       info.FindLatency(INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT, 1, &component));
   EXPECT_TRUE(
       info.FindLatency(INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT, 0, &component));
   EXPECT_EQ(component.sequence_number, 30);
   EXPECT_EQ(component.event_count, 5u);
   EXPECT_EQ(component.event_time.ToInternalValue(), (100 * 2 + 200 * 3) / 5);
 }
 
 TEST(LatencyInfoTest, RemoveLatency) {
   LatencyInfo info;
+  info.set_trace_id(1);
   info.AddLatencyNumber(INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT, 0, 0);
   info.AddLatencyNumber(INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT, 1, 0);
   info.AddLatencyNumber(INPUT_EVENT_LATENCY_UI_COMPONENT, 0, 0);
 
   info.RemoveLatency(INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT);
 
   EXPECT_FALSE(info.FindLatency(INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT, 0, 0));
   EXPECT_FALSE(info.FindLatency(INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT, 1, 0));
   EXPECT_TRUE(info.FindLatency(INPUT_EVENT_LATENCY_UI_COMPONENT, 0, 0));
 }
 
 }  // namespace ui