cc: Control defer_commits logic by Scheduler

cc/scheduler/scheduler.cc

Index: cc/scheduler/scheduler.cc
diff --git a/cc/scheduler/scheduler.cc b/cc/scheduler/scheduler.cc
index 4a682cdb4418f973bbae6475caf8831f4688ab2e..80d2b76478ea35c623b14ae2667e1d5d3f9980f5 100644
--- a/cc/scheduler/scheduler.cc
+++ b/cc/scheduler/scheduler.cc
@@ -612,6 +612,12 @@ void Scheduler::DrawAndSwapIfPossible() {
   state_machine_.DidDrawIfPossibleCompleted(result);
 }
 
+void Scheduler::SetDeferCommits(bool defer_commits) {
+  TRACE_EVENT0("cc", "Scheduler::SetDeferCommits");
+  state_machine_.SetDeferCommits(defer_commits);
+  ProcessScheduledActions();
+}
+
 void Scheduler::ProcessScheduledActions() {
   // We do not allow ProcessScheduledActions to be recursive.
   // The top-level call will iteratively execute the next action for us anyway.