diff -r 000000000000 -r 6474c204b198 xpcom/glue/nsTHashtable.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xpcom/glue/nsTHashtable.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,15 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsTHashtable.h"
+
+PLDHashOperator
+PL_DHashStubEnumRemove(PLDHashTable    *table,
+                                       PLDHashEntryHdr *entry,
+                                       uint32_t         ordinal,
+                                       void            *userarg)
+{
+  return PL_DHASH_REMOVE;
+}