Create own file for background calculations in layout

Move display_list_builder.rs and webrender_helpers.rs
along with the new file to components/layout/display_list/

Remove apparently unused IdType enum.
Only variant used was OverflowClip.

See #19676

1 files changed, 2 insertions, 2 deletions

diff --git a/components/layout/table_caption.rs b/components/layout/table_caption.rs
index c6425e93b4e..63292cfbb55 100644
--- a/components/layout/table_caption.rs
+++ b/components/layout/table_caption.rs
@@ -9,8 +9,8 @@
 use app_units::Au;
 use block::BlockFlow;
 use context::LayoutContext;
-use display_list_builder::{BlockFlowDisplayListBuilding, DisplayListBuildState};
-use display_list_builder::{StackingContextCollectionFlags, StackingContextCollectionState};
+use display_list::{BlockFlowDisplayListBuilding, DisplayListBuildState};
+use display_list::{StackingContextCollectionFlags, StackingContextCollectionState};
 use euclid::Point2D;
 use flow::{Flow, FlowClass, OpaqueFlow};
 use fragment::{Fragment, FragmentBorderBoxIterator, Overflow};