ui: Cleanup class/struct forward declarations

third_party/WebKit/LayoutTests/imported/wpt/dom/nodes/Element-closest.html

Index: third_party/WebKit/LayoutTests/imported/wpt/dom/nodes/Element-closest.html
diff --git a/third_party/WebKit/LayoutTests/imported/wpt/dom/nodes/Element-closest.html b/third_party/WebKit/LayoutTests/imported/wpt/dom/nodes/Element-closest.html
index 386e3bd251bdb41587173bb89bcc0471733e0699..e5af1a43b629e8e51f96d48da3c13546f9d0eb8e 100644
--- a/third_party/WebKit/LayoutTests/imported/wpt/dom/nodes/Element-closest.html
+++ b/third_party/WebKit/LayoutTests/imported/wpt/dom/nodes/Element-closest.html
@@ -56,10 +56,11 @@
   do_test(":first-child"               , "test12", "test3");
   do_test(":invalid"                   , "test11", "test2");
 
-  do_test(":scope"                     , "test4",  "test4");
-  do_test("select > :scope"            , "test4",  "test4");
-  do_test("div > :scope"               , "test4",  "");
-  do_test(":has(> :scope)"             , "test4",  "test3");
+  do_scope_test(":scope"               , "test4");
+  do_scope_test("select > :scope"      , "test4");
+  do_scope_test("div > :scope"         , "test4");
+  do_scope_test(":has(> :scope)"       , "test4");
+
 function do_test(aSelector, aElementId, aTargetId) {
   test(function() {
     var el = document.getElementById(aElementId).closest(aSelector);
@@ -70,4 +71,13 @@ function do_test(aSelector, aElementId, aTargetId) {
     }
   }, "Element.closest with context node '" + aElementId + "' and selector '" + aSelector + "'");
 }
+
+function do_scope_test(aSelector, aElementId) {
+  test(function() {
+    var el = document.getElementById(aElementId);
+    assert_throws("SYNTAX_ERR", function() {
+      el.closest(aSelector);
+    });
+  }, "Element.closest with context node '" + aElementId + "' and selector '" + aSelector + "' should throw");
+}
 </script>