Refactoring datalist test to use the supported flag.

I added this flag as part of previous element refactoring, fixing the test to use it.

BUG=

Review URL: https://codereview.chromium.org//11667029

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@16566 260f80e4-7a28-3924-810f-c04153c831b5

tests/html/datalistelement_test.dart

@@ -34,26 +34,36 @@ main() {
       document.body.nodes.removeLast();
     });
 
+  // Support is checked in element_types test.
+  var expectation = DataListElement.supported ? returnsNormally : throws;
 
   test('is', () {
+    expect(() {
       var list = document.query('#browsers');
       expect(list, isDataListElement);
+    }, expectation);
   });
 
   test('list', () {
+    expect(() {
       var list = document.query('#browsers');
       var input = document.query('#input');
       expect(input.list, list);
+    }, expectation);
   });
 
   test('options', () {
+    expect(() {
       var options = document.query('#browsers')
           .queryAll('option');  // Uses DataListElement.
       expect(options.length, 5);
+    }, expectation);
   });
 
   test('create', () {
+    expect(() {
       var list = new DataListElement();
       expect(list, isDataListElement);
-    });
+    }, expectation);
+  });
 }

tests/html/html.status

@@ -133,7 +133,6 @@ audiocontext_test: Fail
 blob_constructor_test: Fail
 cache_test: fail              # IE9 does not support ApplicationCache, but IE 10 does (and should work).
 css_test: Fail
-datalistelement_test: Fail    # ie9 does not have HTMLDataListElement
 dom_constructors_test: Fail
 element_test/additionalConstructors: Fail
 exceptions_test: Fail
@@ -186,10 +185,8 @@ input_element_test/supported_range: Fail, Crash    # TODO(efortuna): Please tria
 input_element_test/supported_time: Fail, Crash
 input_element_test/supported_week: Fail, Crash
 fileapi_test: Fail # requestFileSystem not supported in Safari 6.
-datalistelement_test: Fail # HTMLDataListElement not yet supported in Safari.
 # TODO(efortuna): Make our test framework able to separate tests out by browser
 # version.
-datalistelement_test: Fail # Issue: 7414
 node_test: Skip # Issue 6457
 
 [ $runtime == opera && $system == windows ]