cc: Remove ValidateRenderSurfaces debug check

cc/trees/layer_tree_host_common.cc

Index: cc/trees/layer_tree_host_common.cc
diff --git a/cc/trees/layer_tree_host_common.cc b/cc/trees/layer_tree_host_common.cc
index f21ed3fb153db4bf4c06d3e7a787c719afff1091..7b1963e38f52410c1e535423fb7803ffa85f140c 100644
--- a/cc/trees/layer_tree_host_common.cc
+++ b/cc/trees/layer_tree_host_common.cc
@@ -1202,30 +1202,12 @@ struct PreCalculateMetaInformationRecursiveData {
   }
 };
 
-static bool ValidateRenderSurface(LayerImpl* layer) {
-  // There are a few cases in which it is incorrect to not have a
-  // render_surface.
-  if (layer->render_surface())
-    return true;
-
-  return layer->filters().IsEmpty() && layer->background_filters().IsEmpty() &&
-         !layer->mask_layer() && !layer->replica_layer() &&
-         !IsRootLayer(layer) && !layer->is_root_for_isolated_group() &&
-         !layer->HasCopyRequest();
-}
-
-static bool ValidateRenderSurface(Layer* layer) {
-  return true;
-}
-
 // Recursively walks the layer tree to compute any information that is needed
 // before doing the main recursion.
 template <typename LayerType>
 static void PreCalculateMetaInformation(
     LayerType* layer,
     PreCalculateMetaInformationRecursiveData* recursive_data) {
-  DCHECK(ValidateRenderSurface(layer));
-
   layer->draw_properties().sorted_for_recursion = false;
   layer->draw_properties().has_child_with_a_scroll_parent = false;