cc: ReadyToDraw notifications.

cc/scheduler/scheduler.cc

Index: cc/scheduler/scheduler.cc
diff --git a/cc/scheduler/scheduler.cc b/cc/scheduler/scheduler.cc
index 4c2316fc048ac5d8bee6004f850621d398b7eed3..2a86d4bb15a7068774a9257146dec8f2963c4f5a 100644
--- a/cc/scheduler/scheduler.cc
+++ b/cc/scheduler/scheduler.cc
@@ -197,6 +197,11 @@ void Scheduler::NotifyReadyToActivate() {
   ProcessScheduledActions();
 }
 
+void Scheduler::NotifyReadyToDraw() {
+  // Empty for now, until we take action based on the notification as part of
+  // crbugs 352894, 383157, 421923.
+}
+
 void Scheduler::SetNeedsCommit() {
   state_machine_.SetNeedsCommit();
   ProcessScheduledActions();