Update from chromium https://crrev.com/301725/

base/debug/task_annotator.cc

Index: base/debug/task_annotator.cc
diff --git a/base/debug/task_annotator.cc b/base/debug/task_annotator.cc
index f2e4b7341c169a8870115cf35b77398afcb76c3c..ae2d7975c2e721a7f8087f6036f1010d78b88d96 100644
--- a/base/debug/task_annotator.cc
+++ b/base/debug/task_annotator.cc
@@ -30,6 +30,7 @@ void TaskAnnotator::RunTask(const char* queue_function,
                             const PendingTask& pending_task) {
   tracked_objects::ThreadData::PrepareForStartOfRun(pending_task.birth_tally);
   tracked_objects::TaskStopwatch stopwatch;
+  stopwatch.Start();
   tracked_objects::Duration queue_duration =
       stopwatch.StartTime() - pending_task.EffectiveTimePosted();