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 f8f0f5adad1c8ec429af576c47c4951ccdd51431..6875ed8d1f12a3f9a8e2271395f451694b94962f 100644
--- a/components/scheduler/child/scheduler_helper_unittest.cc
+++ b/components/scheduler/child/scheduler_helper_unittest.cc
@@ -45,7 +45,8 @@ void AppendToVectorReentrantTask(base::SingleThreadTaskRunner* task_runner,
 class SchedulerHelperTest : public testing::Test {
  public:
   SchedulerHelperTest()
-      : clock_(new base::SimpleTestTickClock()),
+      : clock_(new base::SimpleTestTickClock(
+            base::TimeTicks() + base::TimeDelta::FromMicroseconds(1))),
         mock_task_runner_(new cc::OrderedSimpleTaskRunner(clock_.get(), false)),
         main_task_runner_(SchedulerTqmDelegateForTest::Create(
             mock_task_runner_,
@@ -55,9 +56,7 @@ class SchedulerHelperTest : public testing::Test {
             "test.scheduler",
             TRACE_DISABLED_BY_DEFAULT("test.scheduler"),
             TRACE_DISABLED_BY_DEFAULT("test.scheduler.dbg"))),
-        default_task_runner_(scheduler_helper_->DefaultTaskRunner()) {
-    clock_->Advance(base::TimeDelta::FromMicroseconds(5000));
-  }
+        default_task_runner_(scheduler_helper_->DefaultTaskRunner()) {}
 
   ~SchedulerHelperTest() override {}