Remove SendBeginFramesToChildren plumbing

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 b6e99d23ea9214acd5f70892a812d4eb9f5f71a4..6628c0635e5f677b1002f997815eced86970bd59 100644
--- a/cc/trees/single_thread_proxy.cc
+++ b/cc/trees/single_thread_proxy.cc
@@ -726,12 +726,6 @@ bool SingleThreadProxy::MainFrameWillHappenForTesting() {
   return scheduler_on_impl_thread_->MainFrameForTestingWillHappen();
 }
 
-void SingleThreadProxy::SetChildrenNeedBeginFrames(
-    bool children_need_begin_frames) {
-  scheduler_on_impl_thread_->SetChildrenNeedBeginFrames(
-      children_need_begin_frames);
-}
-
 void SingleThreadProxy::SetAuthoritativeVSyncInterval(
     const base::TimeDelta& interval) {
   authoritative_vsync_interval_ = interval;
@@ -912,8 +906,4 @@ void SingleThreadProxy::DidFinishImplFrame() {
 #endif
 }
 
-void SingleThreadProxy::SendBeginFramesToChildren(const BeginFrameArgs& args) {
-  layer_tree_host_->SendBeginFramesToChildren(args);
-}
-
 }  // namespace cc