Provision to start base::SimpleTestTickClock at initial ticks

components/scheduler/base/task_queue_manager_unittest.cc

Index: components/scheduler/base/task_queue_manager_unittest.cc
diff --git a/components/scheduler/base/task_queue_manager_unittest.cc b/components/scheduler/base/task_queue_manager_unittest.cc
index c32c43ecf86c0919fe037d56f6e9c4dccf8a8e3b..e24964a06dd07447c0860cda7749735b8e04a0af 100644
--- a/components/scheduler/base/task_queue_manager_unittest.cc
+++ b/components/scheduler/base/task_queue_manager_unittest.cc
@@ -72,14 +72,14 @@ class TaskQueueManagerTest : public testing::Test {
   }
 
   void Initialize(size_t num_queues) {
-    now_src_.reset(new base::SimpleTestTickClock());
-    now_src_->Advance(base::TimeDelta::FromMicroseconds(1000));
+    now_src_.reset(new base::SimpleTestTickClock(
+        base::TimeTicks() + base::TimeDelta::FromMicroseconds(1000)));
     InitializeWithClock(num_queues,
                         make_scoped_ptr(new TestTimeSource(now_src_.get())));
   }
 
   void InitializeWithRealMessageLoop(size_t num_queues) {
-    now_src_.reset(new base::SimpleTestTickClock());
+    now_src_.reset(new base::SimpleTestTickClock(base::TimeTicks()));
     message_loop_.reset(new base::MessageLoop());
     manager_ = make_scoped_ptr(new TaskQueueManager(
         MessageLoopTaskRunner::Create(