Adding relList attr to link and anchor element

LayoutTests/fast/dom/relList_on_anchor.html

Index: LayoutTests/fast/dom/relList_on_anchor.html
diff --git a/LayoutTests/fast/dom/relList_on_anchor.html b/LayoutTests/fast/dom/relList_on_anchor.html
new file mode 100644
index 0000000000000000000000000000000000000000..90e83fa77ffb3e323b2a4000cf88f89e3386ae57
--- /dev/null
+++ b/LayoutTests/fast/dom/relList_on_anchor.html
@@ -0,0 +1,21 @@
+<a id="anchorId" rel="shortcut icon" href="../images/resources/1bit.ico"/>

[Inactive, 2014/07/25 12:55:51]

Please add back the DOCTYPE.

+<script src="../../resources/js-test.js"></script>
+<script>
+description("Checks relList attribute on anchor element");
+
+var anchor = document.getElementById('anchorId');
+shouldBe("anchor.relList.__proto__", "DOMTokenList.prototype");
+shouldBeTrue("anchor.relList.contains('shortcut')");

[Inactive, 2014/07/25 12:55:51]

The issue with contains() is that you don't verify that the value is at the
expected index. How about using:
shouldBeEqualToString("anchor.relList[0]", "shortcut");

+shouldBeTrue("anchor.relList.contains('icon')");
+shouldBe("anchor.relList.length", "2");
+shouldBeFalse("anchor.relList.contains('shortcut1')");
+shouldNotThrow("anchor.rel = 'nofollow'");
+shouldBe("anchor.relList.length", "1");
+shouldBeTrue("anchor.relList.contains('nofollow')");
+shouldBeFalse("anchor.relList.contains('shortcut')");
+shouldBeFalse("anchor.relList.contains('icon')");
+shouldNotThrow("anchor.removeAttribute('rel')");
+shouldBeEmptyString("anchor.rel");
+shouldBe("anchor.relList.length", "0");
+shouldBeUndefined("anchor.relList[0]");
+</script>