cc: Remove EnsureRenderSurfaceLayerList, do UpdateDrawProps when needed.

cc/layers/layer_impl.cc

Index: cc/layers/layer_impl.cc
diff --git a/cc/layers/layer_impl.cc b/cc/layers/layer_impl.cc
index 79e64aa079c96d774d44ad4d791ca9d51b37abd2..7668becc132ddf2dc3ac0db94a2f448d31f3284c 100644
--- a/cc/layers/layer_impl.cc
+++ b/cc/layers/layer_impl.cc
@@ -479,10 +479,6 @@ skia::RefPtr<SkPicture> LayerImpl::GetPicture() {
   return skia::RefPtr<SkPicture>();
 }
 
-bool LayerImpl::AreVisibleResourcesReady() const {
-  return true;
-}
-
 scoped_ptr<LayerImpl> LayerImpl::CreateLayerImpl(LayerTreeImpl* tree_impl) {
   return LayerImpl::Create(tree_impl, layer_id_);
 }