cc: Add SwapPromiseManager and SurfaceSequenceGenerator.

cc/trees/layer_tree.cc

Index: cc/trees/layer_tree.cc
diff --git a/cc/trees/layer_tree.cc b/cc/trees/layer_tree.cc
index 7282f52b671098bc8f561d2dc3f5c34a3875ab5d..cf0c3bc4760acdc50ee11f53511f2f8162d980bf 100644
--- a/cc/trees/layer_tree.cc
+++ b/cc/trees/layer_tree.cc
@@ -720,12 +720,4 @@ void LayerTree::SetNeedsDisplayOnAllLayers() {
     layer->SetNeedsDisplay();
 }
 
-UIResourceManager* LayerTree::GetUIResourceManager() const {
-  return layer_tree_host_->GetUIResourceManager();
-}
-
-const LayerTreeSettings& LayerTree::GetSettings() const {
-  return layer_tree_host_->GetSettings();
-}
-
 }  // namespace cc