Revert "Cleaning up shadow dom tests."

tests/html/shadow_dom_test.dart

Index: tests/html/shadow_dom_test.dart
diff --git a/tests/html/shadow_dom_test.dart b/tests/html/shadow_dom_test.dart
index b4cbc57bc1fb680bf0cd7389f297307ff3b7727c..8e9a93209e4df399723812d29a4ae4ceb609b86a 100644
--- a/tests/html/shadow_dom_test.dart
+++ b/tests/html/shadow_dom_test.dart
@@ -14,7 +14,7 @@ main() {
 
     var div1, div2, shadowRoot, paragraph1, paragraph2;
 
-    void init() {
+    setUp(() {
       paragraph1 = new ParagraphElement();
       paragraph2 = new ParagraphElement();
       [paragraph1, paragraph2].forEach((p) { p.classes.add('foo');});
@@ -29,24 +29,14 @@ main() {
       div2.nodes.add(paragraph2);
       document.body.nodes.add(div1);
       document.body.nodes.add(div2);
-    }
-
-    var expectation = ShadowRoot.supported ? returnsNormally : throws;
+    });
 
     test("Shadowed nodes aren't visible to queries from outside ShadowDOM", () {
-      expect(() {
-        init();
-
-        expect(queryAll('.foo'), equals([div1, paragraph2]));
-      }, expectation);
+      expect(queryAll('.foo'), equals([div1, paragraph2]));
     });
 
     test('Parent node of a shadow root must be null.', () {
-      expect(() {
-        init();
-
-        expect(shadowRoot.parent, isNull);
-      }, expectation);
+      expect(shadowRoot.parent, isNull);
     });
 
 
@@ -56,11 +46,7 @@ main() {
     // rendering tests.
 
     test('Querying in shadowed fragment respects the shadow boundary.', () {
-      expect(() {
-        init();
-
-        expect(shadowRoot.queryAll('.foo'), equals([paragraph1]));
-      }, expectation);
+      expect(shadowRoot.queryAll('.foo'), equals([paragraph1]));
     });
   });
 }