[scheduler] Teach scheduler about audio state

cc/test/ordered_simple_task_runner.cc

Index: cc/test/ordered_simple_task_runner.cc
diff --git a/cc/test/ordered_simple_task_runner.cc b/cc/test/ordered_simple_task_runner.cc
index a3d66ee6d3a58510e49557842b0498955f17fc83..9dc4bbcd2dacb680d586699576a632e286aab037 100644
--- a/cc/test/ordered_simple_task_runner.cc
+++ b/cc/test/ordered_simple_task_runner.cc
@@ -247,9 +247,11 @@ bool OrderedSimpleTaskRunner::RunUntilTime(base::TimeTicks time) {
   // Run tasks
   bool result = RunTasksWhile(NowBefore(time));
 
+  bool has_reached_task_limit = HasPendingTasks() && NextTaskTime() <= time;
+
   // If the next task is after the stopping time and auto-advancing now, then
   // force time to be the stopping time.
-  if (!result && advance_now_ && now_src_->NowTicks() < time) {
+  if (!has_reached_task_limit && advance_now_ && now_src_->NowTicks() < time) {
     now_src_->Advance(time - now_src_->NowTicks());
   }