Fix mistake at MarkContainerChainForOverflowRecalcIfNeeded()

In r738875 we stopped marking ancestors if overflow recalc flags
were already present, however by mistake the code was checking
SelfNeedsLayoutOverflowRecalc() instead of
ChildNeedsLayoutOverflowRecalc().

This improves the performance in
perf_tests/shadow_dom/v1-small-deep-distribution.html.

BUG=1051342,941180

Change-Id: Ie94432dd6f207b5abc20132a85ee677a7994a9d3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2055084Reviewed-by: Chris Harrelson <chrishtr@chromium.org>
Commit-Queue: Manuel Rego <rego@igalia.com>
Cr-Commit-Position: refs/heads/master@{#742690}

third_party/blink/renderer/core/layout/layout_object.cc

@@ -2014,7 +2014,7 @@ void LayoutObject::MarkContainerChainForOverflowRecalcIfNeeded(
       bool already_needs_layout_overflow_recalc = false;
       if (mark_container_chain_layout_overflow_recalc) {
         already_needs_layout_overflow_recalc =
-            object->SelfNeedsLayoutOverflowRecalc();
+            object->ChildNeedsLayoutOverflowRecalc();
         if (!already_needs_layout_overflow_recalc)
           object->SetChildNeedsLayoutOverflowRecalc();
       }