Revert of List all child surfaces (including occluded) in CompositorFrame

cc/trees/layer_tree_impl.cc

Index: cc/trees/layer_tree_impl.cc
diff --git a/cc/trees/layer_tree_impl.cc b/cc/trees/layer_tree_impl.cc
index 06635e51f0d5776f8d1d4e5209779092cdc8c0c5..596476081d1b175e64dcaf8246c6b47f83d837ad 100644
--- a/cc/trees/layer_tree_impl.cc
+++ b/cc/trees/layer_tree_impl.cc
@@ -1319,19 +1319,6 @@
   }
 }
 
-void LayerTreeImpl::AddSurfaceLayer(LayerImpl* layer) {
-  DCHECK(std::find(surface_layers_.begin(), surface_layers_.end(), layer) ==
-         surface_layers_.end());
-  surface_layers_.push_back(layer);
-}
-
-void LayerTreeImpl::RemoveSurfaceLayer(LayerImpl* layer) {
-  std::vector<LayerImpl*>::iterator it =
-      std::find(surface_layers_.begin(), surface_layers_.end(), layer);
-  DCHECK(it != surface_layers_.end());
-  surface_layers_.erase(it);
-}
-
 const std::vector<LayerImpl*>& LayerTreeImpl::LayersWithCopyOutputRequest()
     const {
   // Only the active tree needs to know about layers with copy requests, as