Provision to start base::SimpleTestTickClock at initial ticks

components/scheduler/child/scheduler_helper_unittest.cc

Index: components/scheduler/child/scheduler_helper_unittest.cc
diff --git a/components/scheduler/child/scheduler_helper_unittest.cc b/components/scheduler/child/scheduler_helper_unittest.cc
index 0f71675b9e512440b6ae923935b3e5609c5c2fed..2e27b7ef69ca87a20a83b5cb27ca87c4fec148ce 100644
--- a/components/scheduler/child/scheduler_helper_unittest.cc
+++ b/components/scheduler/child/scheduler_helper_unittest.cc
@@ -54,7 +54,6 @@ class SchedulerHelperTest : public testing::Test {
                                 TRACE_DISABLED_BY_DEFAULT("test.scheduler"),
                                 SchedulerHelper::TASK_QUEUE_COUNT)),
         default_task_runner_(scheduler_helper_->DefaultTaskRunner()) {
-    clock_->Advance(base::TimeDelta::FromMicroseconds(5000));
     scheduler_helper_->SetTimeSourceForTesting(
         make_scoped_ptr(new TestTimeSource(clock_.get())));
     scheduler_helper_->GetTaskQueueManagerForTesting()->SetTimeSourceForTesting(