Provision to start base::SimpleTestTickClock at initial ticks

components/scheduler/child/worker_scheduler_impl_unittest.cc

Index: components/scheduler/child/worker_scheduler_impl_unittest.cc
diff --git a/components/scheduler/child/worker_scheduler_impl_unittest.cc b/components/scheduler/child/worker_scheduler_impl_unittest.cc
index 451d86197ce7e8fce8f6f4ff1c5d3bcae921f40f..6ea8335fb9236bfe448a92e191e8118063716ec9 100644
--- a/components/scheduler/child/worker_scheduler_impl_unittest.cc
+++ b/components/scheduler/child/worker_scheduler_impl_unittest.cc
@@ -91,14 +91,14 @@ class WorkerSchedulerImplForTest : public WorkerSchedulerImpl {
 class WorkerSchedulerImplTest : public testing::Test {
  public:
   WorkerSchedulerImplTest()
-      : clock_(new base::SimpleTestTickClock()),
+      : clock_(new base::SimpleTestTickClock(
+            base::TimeTicks() + base::TimeDelta::FromMicroseconds(5000))),
         mock_task_runner_(new cc::OrderedSimpleTaskRunner(clock_.get(), true)),
         nestable_task_runner_(
             NestableTaskRunnerForTest::Create(mock_task_runner_)),
         scheduler_(new WorkerSchedulerImplForTest(nestable_task_runner_,
                                                   clock_.get())),
         timeline_(nullptr) {
-    clock_->Advance(base::TimeDelta::FromMicroseconds(5000));
     scheduler_->GetSchedulerHelperForTesting()->SetTimeSourceForTesting(
         make_scoped_ptr(new TestTimeSource(clock_.get())));
     scheduler_->GetSchedulerHelperForTesting()