[layoutng] Add out-of-flow objects to the positioned objects map

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

Index: third_party/WebKit/Source/core/layout/ng/ng_box.cc
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_box.cc b/third_party/WebKit/Source/core/layout/ng/ng_box.cc
index 3b628478e2967cf451e9567814fb6b3dd5be630d..36a64869c29067d16f9a511cb2116c0559ada873 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_box.cc
+++ b/third_party/WebKit/Source/core/layout/ng/ng_box.cc
@@ -26,6 +26,8 @@ NGBox::NGBox(ComputedStyle* style) : layout_box_(nullptr), style_(style) {
 
 bool NGBox::Layout(const NGConstraintSpace* constraint_space,
                    NGFragment** out) {
+  if (layout_box_ && layout_box_->isOutOfFlowPositioned())
+    layout_box_->containingBlock()->insertPositionedObject(layout_box_);
   // We can either use the new layout code to do the layout and then copy the
   // resulting size to the LayoutObject, or use the old layout code and
   // synthesize a fragment.