[LayoutNG] Fix orthogonal writing mode child margin strut from being used in collapsing margins cal…

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 28ad7cb8d1c4b38fc4681bf0c81d0e83fa581bb1..4a77cde1f6bd87f2bec3b4110d554cfe7ee4f49a 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
@@ -20,7 +20,8 @@ class CORE_EXPORT NGPhysicalFragment final : public NGPhysicalFragmentBase {
                      NGPhysicalSize overflow,
                      HeapVector<Member<const NGPhysicalFragmentBase>>& children,
                      NGMarginStrut margin_strut)
-      : NGPhysicalFragmentBase(size, overflow, FragmentBox, margin_strut) {
+      : NGPhysicalFragmentBase(size, overflow, FragmentBox),
+        margin_strut_(margin_strut) {
     children_.swap(children);
   }
 
@@ -28,6 +29,8 @@ class CORE_EXPORT NGPhysicalFragment final : public NGPhysicalFragmentBase {
     return children_;
   }
 
+  NGMarginStrut MarginStrut() const { return margin_strut_; }
+
   DEFINE_INLINE_TRACE_AFTER_DISPATCH() {
     visitor->trace(children_);
     NGPhysicalFragmentBase::traceAfterDispatch(visitor);
@@ -35,10 +38,18 @@ class CORE_EXPORT NGPhysicalFragment final : public NGPhysicalFragmentBase {
 
  private:
   HeapVector<Member<const NGPhysicalFragmentBase>> children_;
+
+  NGMarginStrut margin_strut_;
 };
 
 WILL_NOT_BE_EAGERLY_TRACED_CLASS(NGPhysicalFragment);
 
+DEFINE_TYPE_CASTS(NGPhysicalFragment,
+                  NGPhysicalFragmentBase,
+                  fragment,
+                  fragment->Type() == NGPhysicalFragmentBase::FragmentBox,
+                  fragment.Type() == NGPhysicalFragmentBase::FragmentBox);
+
 }  // namespace blink
 
 #endif  // NGPhysicalFragment_h