Adding Element.closest() API

LayoutTests/fast/selectors/element-closest-scope-expected.txt

Index: LayoutTests/fast/selectors/element-closest-scope-expected.txt
diff --git a/LayoutTests/fast/selectors/element-closest-scope-expected.txt b/LayoutTests/fast/selectors/element-closest-scope-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..6f7f5f86f2d867c17bfcf87e99c1e5491e80e67a
--- /dev/null
+++ b/LayoutTests/fast/selectors/element-closest-scope-expected.txt
@@ -0,0 +1,28 @@
+This test makes sure that :scope works correctly with the closest() API.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS theTarget.closest(":scope") is theTarget
+PASS theTarget.closest(":not(:scope)") is body
+PASS theTarget.closest("body :scope") is theTarget
+PASS theTarget.closest("body > :scope") is theTarget
+PASS theTarget.closest("body:scope") is null
+PASS theTarget.closest("sibling + :scope") is theTarget
+PASS theTarget.closest("sibling ~ :scope") is theTarget
+PASS theTarget.closest("#theTarget:scope") is theTarget
+PASS theTarget.closest(":scope#theTarget") is theTarget
+PASS theTarget.closest("[webkit]:scope#theTarget") is theTarget
+PASS theTarget.closest(":not([webkit=fast]):scope#theTarget") is null
+PASS theTarget.closest(":scope target") is null
+PASS theTarget.closest(":scope > target") is null
+PASS theTarget.closest(":scope + target") is null
+PASS theTarget.closest(":scope ~ target") is null
+PASS theTarget.closest(":scope *") is null
+PASS theTarget.closest(":scope > *") is null
+PASS theTarget.closest(":scope + *") is null
+PASS theTarget.closest(":scope ~ *") is null
+PASS successfullyParsed is true
+
+TEST COMPLETE
+