Scheduler/child/TimeSource could be replaced with base/time/DefaultTickClock.

components/scheduler/child/test_time_source.cc

Index: components/scheduler/child/test_time_source.cc
diff --git a/components/scheduler/child/test_time_source.cc b/components/scheduler/child/test_time_source.cc
index 3482bb51bad38b0c26e4724b8179522813c33bd1..0c17193edc9bcdcea8ed3b3b8048caecf66642a1 100644
--- a/components/scheduler/child/test_time_source.cc
+++ b/components/scheduler/child/test_time_source.cc
@@ -15,7 +15,7 @@ TestTimeSource::TestTimeSource(scoped_refptr<cc::TestNowSource> time_source)
 TestTimeSource::~TestTimeSource() {
 }
 
-base::TimeTicks TestTimeSource::Now() const {
+base::TimeTicks TestTimeSource::NowTicks() {
   return time_source_->Now();
 }