Provision to start base::SimpleTestTickClock at initial ticks

components/copresence/timed_map_unittest.cc

Index: components/copresence/timed_map_unittest.cc
diff --git a/components/copresence/timed_map_unittest.cc b/components/copresence/timed_map_unittest.cc
index 7dcaaf02f0ab8d1589617aed952d05a8abbe86f7..c361123112aef3d355e383c185a1e99a571962f3 100644
--- a/components/copresence/timed_map_unittest.cc
+++ b/components/copresence/timed_map_unittest.cc
@@ -97,7 +97,8 @@ TEST_F(TimedMapTest, TimedEvict) {
   Map map(base::TimeDelta::FromSeconds(kLargeTimeValueSeconds), 2);
 
   // The map takes ownership of the clock, but we retain a pointer.
-  base::SimpleTestTickClock* clock = new base::SimpleTestTickClock;
+  base::SimpleTestTickClock* clock =
+      new base::SimpleTestTickClock(base::TimeTicks());
   map.set_clock_for_testing(make_scoped_ptr<base::TickClock>(clock));
 
   // Add value at T=0.