Provision to start base::SimpleTestTickClock at initial ticks

cc/surfaces/display_scheduler_unittest.cc

Index: cc/surfaces/display_scheduler_unittest.cc
diff --git a/cc/surfaces/display_scheduler_unittest.cc b/cc/surfaces/display_scheduler_unittest.cc
index 0f2725dbc713d64c2b72f77a51a33875a0bf802a..703339f17019d14e378e2658c5b166c1b1da79d3 100644
--- a/cc/surfaces/display_scheduler_unittest.cc
+++ b/cc/surfaces/display_scheduler_unittest.cc
@@ -71,15 +71,14 @@ class TestDisplayScheduler : public DisplayScheduler {
 class DisplaySchedulerTest : public testing::Test {
  public:
   DisplaySchedulerTest()
-      : now_src_(new base::SimpleTestTickClock()),
+      : now_src_(new base::SimpleTestTickClock(
+            base::TimeTicks() + base::TimeDelta::FromMicroseconds(1))),
         task_runner_(new base::NullTaskRunner),
         client_(new FakeDisplaySchedulerClient),
         scheduler_(new TestDisplayScheduler(client_.get(),
                                             &fake_begin_frame_source_,
                                             task_runner_.get(),
-                                            kMaxPendingSwaps)) {
-    now_src_->Advance(base::TimeDelta::FromMicroseconds(10000));
-  }
+                                            kMaxPendingSwaps)) {}
 
   ~DisplaySchedulerTest() override {}