cc: Remove estimated parent draw time from renderer

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 b85f0f8a9698cae9aa8f2b5dfd34adc32c84f520..502599f36a97380553a0a64fd35dd7d4ebf7deae 100644
--- a/cc/trees/single_thread_proxy.cc
+++ b/cc/trees/single_thread_proxy.cc
@@ -432,11 +432,6 @@ void SingleThreadProxy::SetBeginFrameSource(BeginFrameSource* source) {
     scheduler_on_impl_thread_->SetBeginFrameSource(source);
 }
 
-void SingleThreadProxy::SetEstimatedParentDrawTime(base::TimeDelta draw_time) {
-  if (scheduler_on_impl_thread_)
-    scheduler_on_impl_thread_->SetEstimatedParentDrawTime(draw_time);
-}
-
 void SingleThreadProxy::DidSwapBuffersCompleteOnImplThread() {
   TRACE_EVENT0("cc,benchmark",
                "SingleThreadProxy::DidSwapBuffersCompleteOnImplThread");