Fix non-Oilpan ref pointer usage over DOMTokenLists.

third_party/WebKit/Source/core/html/ClassList.cpp

Index: third_party/WebKit/Source/core/html/ClassList.cpp
diff --git a/third_party/WebKit/Source/core/html/ClassList.cpp b/third_party/WebKit/Source/core/html/ClassList.cpp
index 1637c65a3b5f02a7075cd140e4dd76af447bf117..c37b6bf40db80f912a59bbc3b48debc74a4e94db 100644
--- a/third_party/WebKit/Source/core/html/ClassList.cpp
+++ b/third_party/WebKit/Source/core/html/ClassList.cpp
@@ -32,6 +32,20 @@ using namespace HTMLNames;
 
 ClassList::ClassList(Element* element) : DOMTokenList(nullptr), m_element(element) { }
 
+#if !ENABLE(OILPAN)
+void ClassList::ref()
+{
+    m_element->ref();
+    DOMTokenList::ref();
+}
+
+void ClassList::deref()
+{
+    m_element->deref();
+    DOMTokenList::deref();
+}
+#endif
+
 unsigned ClassList::length() const
 {
     return m_element->hasClass() ? classNames().size() : 0;