cc: Add SetChildrenNeedBeginFrames() & SendBeginFramesToChildren()

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 f15c7ec269256105167466e691e5d94d306d60a4..ac26ef34c0837cf55593f20d6d87cd97acf24184 100644
--- a/cc/trees/single_thread_proxy.cc
+++ b/cc/trees/single_thread_proxy.cc
@@ -640,6 +640,12 @@ bool SingleThreadProxy::MainFrameWillHappenForTesting() {
   return false;
 }
 
+void SingleThreadProxy::SetChildrenNeedBeginFrames(
+    bool children_need_begin_frames) {
+  scheduler_on_impl_thread_->SetChildrenNeedBeginFrames(
+      children_need_begin_frames);
+}
+
 void SingleThreadProxy::WillBeginImplFrame(const BeginFrameArgs& args) {
   layer_tree_host_impl_->WillBeginImplFrame(args);
 }
@@ -803,4 +809,8 @@ void SingleThreadProxy::DidBeginImplFrameDeadline() {
   layer_tree_host_impl_->ResetCurrentBeginFrameArgsForNextFrame();
 }
 
+void SingleThreadProxy::SendBeginFramesToChildren(const BeginFrameArgs& args) {
+  layer_tree_host_->SendBeginFramesToChildren(args);
+}
+
 }  // namespace cc