1 files changed, 4 insertions, 1 deletions
diff --git a/chromium/third_party/WebKit/Source/core/xml/XPathNSResolver.h b/chromium/third_party/WebKit/Source/core/xml/XPathNSResolver.h
index fc761f6459e..10768325968 100644
--- a/chromium/third_party/WebKit/Source/core/xml/XPathNSResolver.h
+++ b/chromium/third_party/WebKit/Source/core/xml/XPathNSResolver.h
@@ -28,16 +28,19 @@
 #define XPathNSResolver_h
 
 #include "bindings/v8/ScriptWrappable.h"
+#include "platform/heap/Handle.h"
 #include "wtf/Forward.h"
 #include "wtf/RefCounted.h"
 
 namespace WebCore {
 
-class XPathNSResolver : public RefCounted<XPathNSResolver>, public ScriptWrappable {
+class XPathNSResolver : public RefCountedWillBeGarbageCollectedFinalized<XPathNSResolver>, public ScriptWrappable {
 public:
     virtual ~XPathNSResolver();
     virtual AtomicString lookupNamespaceURI(const String& prefix) = 0;
 
+    virtual void trace(Visitor*) { }
+
 protected:
     XPathNSResolver()
     {