Oilpan: add transition types to shadow DOM supporting objects.

Source/core/dom/shadow/ContentDistribution.h

Index: Source/core/dom/shadow/ContentDistribution.h
diff --git a/Source/core/dom/shadow/ContentDistribution.h b/Source/core/dom/shadow/ContentDistribution.h
index 65a221d9ea896ee0217f95d600dcfc3aaf334690..200cd0d5019f5a1cb615d6facb608c76b4069e6c 100644
--- a/Source/core/dom/shadow/ContentDistribution.h
+++ b/Source/core/dom/shadow/ContentDistribution.h
@@ -38,18 +38,19 @@
 
 namespace WebCore {
 
-class ContentDistribution {
+class ContentDistribution FINAL {
+    DISALLOW_ALLOCATION();
 public:
     ContentDistribution() { m_nodes.reserveInitialCapacity(32); }
 
-    PassRefPtr<Node> first() const { return m_nodes.first(); }
-    PassRefPtr<Node> last() const { return m_nodes.last(); }
-    PassRefPtr<Node> at(size_t index) const { return m_nodes.at(index); }
+    PassRefPtrWillBeRawPtr<Node> first() const { return m_nodes.first(); }
+    PassRefPtrWillBeRawPtr<Node> last() const { return m_nodes.last(); }
+    PassRefPtrWillBeRawPtr<Node> at(size_t index) const { return m_nodes.at(index); }
 
     size_t size() const { return m_nodes.size(); }
     bool isEmpty() const { return m_nodes.isEmpty(); }
 
-    void append(PassRefPtr<Node>);
+    void append(PassRefPtrWillBeRawPtr<Node>);
     void clear() { m_nodes.clear(); m_indices.clear(); }
     void shrinkToFit() { m_nodes.shrinkToFit(); }
 
@@ -60,11 +61,13 @@ public:
 
     void swap(ContentDistribution& other);
 
-    const Vector<RefPtr<Node> >& nodes() const { return m_nodes; }
+    const WillBeHeapVector<RefPtrWillBeMember<Node> >& nodes() const { return m_nodes; }
+
+    void trace(Visitor*);
 
 private:
-    Vector<RefPtr<Node> > m_nodes;
-    HashMap<const Node*, size_t> m_indices;
+    WillBeHeapVector<RefPtrWillBeMember<Node> > m_nodes;
+    WillBeHeapHashMap<RawPtrWillBeMember<const Node>, size_t> m_indices;
 };
 
 }