Provision to start base::SimpleTestTickClock at initial ticks

components/scheduler/child/idle_helper_unittest.cc

Index: components/scheduler/child/idle_helper_unittest.cc
diff --git a/components/scheduler/child/idle_helper_unittest.cc b/components/scheduler/child/idle_helper_unittest.cc
index 03b04474349b810db0704f0e312907c9e59da6f7..9b395a4afb516d35d9e82289106af23914c0b798 100644
--- a/components/scheduler/child/idle_helper_unittest.cc
+++ b/components/scheduler/child/idle_helper_unittest.cc
@@ -173,7 +173,8 @@ class BaseIdleHelperTest : public testing::Test {
   BaseIdleHelperTest(
       base::MessageLoop* message_loop,
       base::TimeDelta required_quiescence_duration_before_long_idle_period)
-      : clock_(new base::SimpleTestTickClock()),
+      : clock_(new base::SimpleTestTickClock(
+            base::TimeTicks() + base::TimeDelta::FromMicroseconds(1))),
         mock_task_runner_(
             message_loop
                 ? nullptr
@@ -192,9 +193,7 @@ class BaseIdleHelperTest : public testing::Test {
             scheduler_helper_.get(),
             required_quiescence_duration_before_long_idle_period)),
         default_task_runner_(scheduler_helper_->DefaultTaskRunner()),
-        idle_task_runner_(idle_helper_->IdleTaskRunner()) {
-    clock_->Advance(base::TimeDelta::FromMicroseconds(5000));
-  }
+        idle_task_runner_(idle_helper_->IdleTaskRunner()) {}
 
   ~BaseIdleHelperTest() override {}