Oilpan: add transition types to track interface objects.

Source/core/html/track/vtt/VTTRegionList.h

Index: Source/core/html/track/vtt/VTTRegionList.h
diff --git a/Source/core/html/track/vtt/VTTRegionList.h b/Source/core/html/track/vtt/VTTRegionList.h
index 35e1b8e8d47f66fa765203dffe8eea3034347f5a..edb87d601b328ecb45c14655fdcf5908b777fba4 100644
--- a/Source/core/html/track/vtt/VTTRegionList.h
+++ b/Source/core/html/track/vtt/VTTRegionList.h
@@ -33,28 +33,27 @@
 
 namespace WebCore {
 
-class VTTRegionList : public RefCounted<VTTRegionList> {
+class VTTRegionList FINAL : public RefCountedWillBeGarbageCollected<VTTRegionList> {
 public:
-    static PassRefPtr<VTTRegionList> create()
+    static PassRefPtrWillBeRawPtr<VTTRegionList> create()
     {
-        return adoptRef(new VTTRegionList());
+        return adoptRefWillBeNoop(new VTTRegionList());
     }
 
-    ~VTTRegionList() { }
-
     unsigned long length() const;
 
     VTTRegion* item(unsigned index) const;
     VTTRegion* getRegionById(const String&) const;
 
-    void add(PassRefPtr<VTTRegion>);
+    void add(PassRefPtrWillBeRawPtr<VTTRegion>);
     bool remove(VTTRegion*);
 
+    void trace(Visitor*);
+
 private:
     VTTRegionList();
-    void clear();
 
-    Vector<RefPtr<VTTRegion> > m_list;
+    WillBeHeapVector<RefPtrWillBeMember<VTTRegion> > m_list;
 };
 
 } // namespace WebCore