diff --git a/mozilla/dom/src/base/nsJSEnvironment.cpp b/mozilla/dom/src/base/nsJSEnvironment.cpp
index e3f52f1a543..8da3e9cbcdd 100644
--- a/mozilla/dom/src/base/nsJSEnvironment.cpp
+++ b/mozilla/dom/src/base/nsJSEnvironment.cpp
@@ -1048,15 +1048,6 @@ struct ContextCallbackItem : public JSTracer
 void
 NoteContextChild(JSTracer *trc, void *thing, uint32 kind)
 {
-  if (kind == JSTRACE_ATOM) {
-    JSAtom *atom = (JSAtom *)thing;
-    jsval v = ATOM_KEY(atom);
-    if (!JSVAL_IS_PRIMITIVE(v)) {
-      thing = JSVAL_TO_GCTHING(v);
-      kind = JSTRACE_OBJECT;
-    }
-  }
-
   if (kind == JSTRACE_OBJECT || kind == JSTRACE_NAMESPACE ||
       kind == JSTRACE_QNAME || kind == JSTRACE_XML) {
     ContextCallbackItem *item = static_cast<ContextCallbackItem*>(trc);