Oilpan: add transition types to shadow DOM supporting objects.

Source/core/html/HTMLContentElement.cpp

Index: Source/core/html/HTMLContentElement.cpp
diff --git a/Source/core/html/HTMLContentElement.cpp b/Source/core/html/HTMLContentElement.cpp
index 696a257568566b5c1601035527465e982d996fa4..5f56d5d13b1ef5c6500d1105a94d5791789e9ada 100644
--- a/Source/core/html/HTMLContentElement.cpp
+++ b/Source/core/html/HTMLContentElement.cpp
@@ -108,7 +108,7 @@ bool HTMLContentElement::validateSelect() const
     return true;
 }
 
-static inline bool checkOneSelector(const CSSSelector& selector, const Vector<Node*, 32>& siblings, int nth)
+static inline bool checkOneSelector(const CSSSelector& selector, const WillBeHeapVector<RawPtrWillBeMember<Node>, 32>& siblings, int nth)
 {
     Element* element = toElement(siblings[nth]);
     SelectorChecker selectorChecker(element->document(), SelectorChecker::CollectingCSSRules);
@@ -117,7 +117,7 @@ static inline bool checkOneSelector(const CSSSelector& selector, const Vector<No
     return selectorChecker.match(context, strategy) == SelectorChecker::SelectorMatches;
 }
 
-bool HTMLContentElement::matchSelector(const Vector<Node*, 32>& siblings, int nth) const
+bool HTMLContentElement::matchSelector(const WillBeHeapVector<RawPtrWillBeMember<Node>, 32>& siblings, int nth) const
 {
     for (const CSSSelector* selector = selectorList().first(); selector; selector = CSSSelectorList::next(*selector)) {
         if (checkOneSelector(*selector, siblings, nth))