Initial implementation of Collapsing Margins computational logic for LayoutNG

third_party/WebKit/Source/core/layout/ng/ng_physical_fragment.h

Index: third_party/WebKit/Source/core/layout/ng/ng_physical_fragment.h
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_physical_fragment.h b/third_party/WebKit/Source/core/layout/ng/ng_physical_fragment.h
index 9951240c8b892fd35251c822fa60c2f78ae768b4..b225795d24ae998e14aba5f93b84c2a6bce0519a 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_physical_fragment.h
+++ b/third_party/WebKit/Source/core/layout/ng/ng_physical_fragment.h
@@ -18,8 +18,9 @@ class CORE_EXPORT NGPhysicalFragment final : public NGPhysicalFragmentBase {
   // This modifies the passed-in children vector.
   NGPhysicalFragment(NGPhysicalSize size,
                      NGPhysicalSize overflow,
-                     HeapVector<Member<const NGPhysicalFragmentBase>>& children)
-      : NGPhysicalFragmentBase(size, overflow, FragmentBox) {
+                     HeapVector<Member<const NGPhysicalFragmentBase>>& children,
+                     NGMarginStrut margin_strut)
+      : NGPhysicalFragmentBase(size, overflow, FragmentBox, margin_strut) {
     children_.swap(children);
   }