1 files changed, 7 insertions, 0 deletions
diff --git a/chromium/third_party/WebKit/Source/core/dom/UserActionElementSet.cpp b/chromium/third_party/WebKit/Source/core/dom/UserActionElementSet.cpp
index 264061fd539..e59d1fa6003 100644
--- a/chromium/third_party/WebKit/Source/core/dom/UserActionElementSet.cpp
+++ b/chromium/third_party/WebKit/Source/core/dom/UserActionElementSet.cpp
@@ -46,10 +46,12 @@ void UserActionElementSet::didDetach(Node* node)
     clearFlags(toElement(node), IsActiveFlag | InActiveChainFlag | IsHoveredFlag);
 }
 
+#if !ENABLE(OILPAN)
 void UserActionElementSet::documentDidRemoveLastRef()
 {
     m_elements.clear();
 }
+#endif
 
 bool UserActionElementSet::hasFlags(const Node* node, unsigned flags) const
 {
@@ -116,4 +118,9 @@ inline void UserActionElementSet::setFlags(Element* element, unsigned flags)
     m_elements.add(element, flags);
 }
 
+void UserActionElementSet::trace(Visitor* visitor)
+{
+    visitor->trace(m_elements);
+}
+
 }