diff -r 000000000000 -r 6474c204b198 layout/style/test/descriptor_database.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/layout/style/test/descriptor_database.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,63 @@
+/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
+/* vim: set shiftwidth=4 tabstop=4 autoindent cindent noexpandtab: */
+/* 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/. */
+
+// Each property has the following fields:
+//   domProp: The name of the relevant member of nsIDOM[NS]CSS2Properties
+//   values: Strings that are values for the descriptor and should be accepted.
+//   invalid_values: Things that are not values for the descriptor and
+//     should be rejected.
+
+var gCSSFontFaceDescriptors = {
+	"font-family": {
+		domProp: "fontFamily",
+		values: [ "\"serif\"", "\"cursive\"", "seriff", "Times New     Roman", "TimesRoman", "\"Times New Roman\"" ],
+		/* not clear that the generics are really invalid */
+		invalid_values: [ "sans-serif", "Times New Roman, serif", "'Times New Roman', serif", "cursive", "fantasy" ]
+	},
+	"font-stretch": {
+		domProp: "fontStretch",
+		values: [ "normal", "ultra-condensed", "extra-condensed", "condensed", "semi-condensed", "semi-expanded", "expanded", "extra-expanded", "ultra-expanded" ],
+		invalid_values: [ "wider", "narrower" ]
+	},
+	"font-style": {
+		domProp: "fontStyle",
+		values: [ "normal", "italic", "oblique" ],
+		invalid_values: []
+	},
+	"font-weight": {
+		domProp: "fontWeight",
+		values: [ "normal", "400", "bold", "100", "200", "300", "500", "600", "700", "800", "900" ],
+		invalid_values: [ "107", "399", "401", "699", "710", "bolder", "lighter" ]
+	},
+	"src": {
+		domProp: null,
+		values: [
+			"url(404.ttf)",
+			"url(\"404.eot\")",
+			"url(\'404.otf\')",
+			"url(404.ttf) format(\"truetype\")",
+			"url(404.ttf) format(\"truetype\", \"opentype\")",
+			"url(404.ttf) format(\"truetype\", \"opentype\"), url(\'404.eot\')",
+			"local(Times New Roman)",
+			"local(\'Times New Roman\')",
+			"local(\"Times New Roman\")",
+			"local(serif)", /* is this valid? */
+			"local(\"serif\")",
+			"url(404.ttf) format(\"truetype\", \"unknown\"), local(Times New Roman), url(\'404.eot\')",
+		],
+		invalid_values: [
+			"url(404.ttf) format(truetype)",
+			"url(404.ttf) format(\"truetype\" \"opentype\")",
+			"url(404.ttf) format(\"truetype\",)",
+			"local(\"Times New\" Roman)",
+		]
+	},
+	"unicode-range": {
+		domProp: null,
+		values: [ "U+0-10FFFF", "U+3-7B3", "U+3??", "U+6A", "U+3????", "U+???", "U+302-302", "U+0-7,U+A-C", "U+100-17F,U+200-17F", "U+3??, U+500-513 ,U+612 , U+4????", "U+1FFF,U+200-27F" ],
+		invalid_values: [ "U+1????-2????", "U+0-7,A-C", "U+100-17F,200-17F" ]
+	}
+}