[LayoutNG] Abort a layout once the BFC offset is resolved.

third_party/WebKit/Source/core/layout/ng/ng_constraint_space.cc

Index: third_party/WebKit/Source/core/layout/ng/ng_constraint_space.cc
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_constraint_space.cc b/third_party/WebKit/Source/core/layout/ng/ng_constraint_space.cc
index c4b3ac75d795e1bee28a262af4dd5f3f18577737..5f3f92b7befb9c8ee1e03548b34f994f6f436a99 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_constraint_space.cc
+++ b/third_party/WebKit/Source/core/layout/ng/ng_constraint_space.cc
@@ -102,8 +102,15 @@ RefPtr<NGConstraintSpace> NGConstraintSpace::CreateFromLayoutObject(
     fixed_block = true;
   }
 
-  bool is_new_fc =
-      box.IsLayoutBlock() && ToLayoutBlock(box).CreatesNewFormattingContext();
+  bool is_new_fc = true;
+  // TODO(ikilpatrick): This DCHECK needs to be enabled once we've switched
+  // LayoutTableCell, etc over to LayoutNG.
+  //
+  // We currently need to "force" LayoutNG roots to be formatting contexts so
+  // that floats have layout performed on them.
+  //
+  // DCHECK(is_new_fc,
+  //  box.IsLayoutBlock() && ToLayoutBlock(box).CreatesNewFormattingContext());
 
   FloatSize icb_float_size = box.View()->ViewportSizeForViewportUnits();
   NGPhysicalSize initial_containing_block_size{