diff -r 000000000000 -r 6474c204b198 toolkit/components/url-classifier/nsIUrlClassifierTable.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/components/url-classifier/nsIUrlClassifierTable.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,31 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* 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 "nsISupports.idl"
+#include "nsIUrlListManager.idl"
+
+// A map that contains a string keys mapped to string values.
+
+[scriptable, uuid(fd1f8334-1859-472d-b01f-4ac6b1121ce4)]
+interface nsIUrlClassifierTable : nsISupports
+{
+    /**
+     * The name used to identify this table
+     */
+    attribute ACString name;
+
+    /**
+     * Set to false if we don't want to update this table.
+     */
+    attribute boolean needsUpdate;
+
+    /**
+     * In the simple case, exists just looks up the string in the
+     * table and call the callback after the query returns with true or
+     * false.  It's possible that something more complex happens
+     * (e.g., canonicalize the url).
+     */
+    void exists(in ACString key, in nsIUrlListManagerCallback cb);
+};