Provision to start base::SimpleTestTickClock at initial ticks

components/scheduler/child/task_queue_manager_unittest.cc

Index: components/scheduler/child/task_queue_manager_unittest.cc
diff --git a/components/scheduler/child/task_queue_manager_unittest.cc b/components/scheduler/child/task_queue_manager_unittest.cc
index d5af6e42f2ce2f3ca97f543e49885827adf9f19c..43fb110dd3ad28f11b9d7e63ce5e93b09b01d148 100644
--- a/components/scheduler/child/task_queue_manager_unittest.cc
+++ b/components/scheduler/child/task_queue_manager_unittest.cc
@@ -118,8 +118,8 @@ class TaskQueueManagerTest : public testing::Test {
   };
 
   void Initialize(size_t num_queues, SelectorType type) {
-    now_src_.reset(new base::SimpleTestTickClock());
-    now_src_->Advance(base::TimeDelta::FromMicroseconds(1000));
+    now_src_.reset(new base::SimpleTestTickClock(
+        base::TimeTicks() + base::TimeDelta::FromMicroseconds(1)));
     test_task_runner_ = make_scoped_refptr(
         new cc::OrderedSimpleTaskRunner(now_src_.get(), false));
     selector_ = make_scoped_ptr(createSelectorForTest(type));
@@ -1043,8 +1043,8 @@ TEST_F(TaskQueueManagerTest, ThreadCheckAfterTermination) {
 }
 
 TEST_F(TaskQueueManagerTest, NextPendingDelayedTaskRunTime) {
-  scoped_ptr<base::SimpleTestTickClock> clock(new base::SimpleTestTickClock());
-  clock->Advance(base::TimeDelta::FromMicroseconds(10000));
+  scoped_ptr<base::SimpleTestTickClock> clock(new base::SimpleTestTickClock(
+      base::TimeTicks() + base::TimeDelta::FromMicroseconds(1)));
   Initialize(2u, SelectorType::Explicit);
   manager_->SetTimeSourceForTesting(
       make_scoped_ptr(new TestTimeSource(clock.get())));