Fix timings in TrackedObjects unit test

base/tracked_objects_unittest.cc

 // Copyright (c) 2012 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.
 
 // Test of classes in the tracked_objects.h classes.
 
 #include "base/tracked_objects.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/process_util.h"
@@ skipping 139 matching lines @@
   ThreadData::ParentChildSet parent_child_set;
   data->SnapshotMaps(false, &birth_map, &death_map, &parent_child_set);
   EXPECT_EQ(1u, birth_map.size());                         // 1 birth location.
   EXPECT_EQ(1, birth_map.begin()->second->birth_count());  // 1 birth.
   EXPECT_EQ(0u, death_map.size());                         // No deaths.
   EXPECT_EQ(0u, parent_child_set.size());                  // No children.
 
 
   // Now instigate another birth, while we are timing the run of the first
   // execution.
-  TrackedTime start_time = ThreadData::NowForStartOfRun(first_birth);
+  ThreadData::NowForStartOfRun(first_birth);
   // Create a child (using the same birth location).
   // TrackingInfo will call TallyABirth() during construction.
   base::TimeTicks kBogusBirthTime;
   base::TrackingInfo pending_task(location, kBogusBirthTime);
+  TrackedTime start_time(pending_task.time_posted);
   // Finally conclude the outer run.
   TrackedTime end_time = ThreadData::NowForEndOfRun();
   ThreadData::TallyRunOnNamedThreadIfTracking(pending_task, start_time,
                                               end_time);
 
   birth_map.clear();
   death_map.clear();
   parent_child_set.clear();
   data->SnapshotMaps(false, &birth_map, &death_map, &parent_child_set);
   EXPECT_EQ(1u, birth_map.size());                         // 1 birth location.
@@ skipping 396 matching lines @@
   EXPECT_EQ(0, process_data.tasks[1].death_data.run_duration_sample);
   EXPECT_EQ(0, process_data.tasks[1].death_data.queue_duration_sum);
   EXPECT_EQ(0, process_data.tasks[1].death_data.queue_duration_max);
   EXPECT_EQ(0, process_data.tasks[1].death_data.queue_duration_sample);
   EXPECT_EQ(kStillAlive, process_data.tasks[1].death_thread_name);
   EXPECT_EQ(0u, process_data.descendants.size());
   EXPECT_EQ(base::GetCurrentProcId(), process_data.process_id);
 }
 
 }  // namespace tracked_objects