Update from https://crrev.com/320931

cc/trees/single_thread_proxy.cc

Index: cc/trees/single_thread_proxy.cc
diff --git a/cc/trees/single_thread_proxy.cc b/cc/trees/single_thread_proxy.cc
index 81c70f099c6a12a66054bb458d9ae79e09f76aaa..1ecce4dd023296642034901ec9e15f7d766d7bbf 100644
--- a/cc/trees/single_thread_proxy.cc
+++ b/cc/trees/single_thread_proxy.cc
@@ -488,6 +488,11 @@ void SingleThreadProxy::CommitVSyncParameters(base::TimeTicks timebase,
     scheduler_on_impl_thread_->CommitVSyncParameters(timebase, interval);
 }
 
+void SingleThreadProxy::SetEstimatedParentDrawTime(base::TimeDelta draw_time) {
+  if (scheduler_on_impl_thread_)
+    scheduler_on_impl_thread_->SetEstimatedParentDrawTime(draw_time);
+}
+
 void SingleThreadProxy::DidSwapBuffersOnImplThread() {
   TRACE_EVENT0("cc", "SingleThreadProxy::DidSwapBuffersOnImplThread");
   if (scheduler_on_impl_thread_)