Move test to a separate group and suppress on Dartium

tests/html/postmessage_structured_test.dart

Index: tests/html/postmessage_structured_test.dart
diff --git a/tests/html/postmessage_structured_test.dart b/tests/html/postmessage_structured_test.dart
index 32daa2a0a34fb7c3f5e3e563b4a3b50ec710d0ea..c42cfedbffca7b7d3d9f997712d2c9919319a5aa 100644
--- a/tests/html/postmessage_structured_test.dart
+++ b/tests/html/postmessage_structured_test.dart
@@ -78,33 +78,6 @@ main() {
       injectSource(JS_CODE);
     });
 
-    test('js-to-dart--null-prototype-eventdata', () {
-      // Pass an object with a null prototype from JavaScript.
-      // It should be seen as a Dart Map.
-      final JS_CODE = """
-         // Call anonymous function to create a local scope.
-         (function() {
-            var o = Object.create(null);
-            o.eggs = 3;
-            var foo = new MessageEvent('stuff', {data: o});
-            window.dispatchEvent(foo);
-          })();
-        """;
-      var completed = false;
-      var subscription = null;
-      subscription = window.on['stuff'].listen(expectAsyncUntil(
-        (MessageEvent e) {
-          var data = e.data;
-          if (data is String) return;    // Messages from unit test protocol.
-          completed = true;
-          subscription.cancel();
-          expect(data, isMap);
-          expect(data['eggs'], equals(3));
-        },
-        () => completed));
-      injectSource(JS_CODE);
-    });
-
     test('dart-to-js-to-dart-postmessage', () {
       // Pass dictionaries between Dart and JavaScript.
 
@@ -163,6 +136,35 @@ main() {
     go('cyclic_list', cyclic_list);
   });
 
+  group('more_primitives', () {
+    test('js-to-dart-null-prototype-eventdata', () {
+      // Pass an object with a null prototype from JavaScript.
+      // It should be seen as a Dart Map.
+      final JS_CODE = """
+       // Call anonymous function to create a local scope.
+       (function() {
+          var o = Object.create(null);
+          o.eggs = 3;
+          var foo = new MessageEvent('stuff', {data: o});
+          window.dispatchEvent(foo);
+        })();
+      """;
+      var completed = false;
+      var subscription = null;
+      subscription = window.on['stuff'].listen(expectAsyncUntil(
+          (MessageEvent e) {
+            var data = e.data;
+            if (data is String) return;    // Messages from unit test protocol.
+            completed = true;
+            subscription.cancel();
+            expect(data, isMap);
+            expect(data['eggs'], equals(3));
+          },
+          () => completed));
+      injectSource(JS_CODE);
+    });
+  });
+
   group('typed_arrays', () {
     var array_buffer = new Uint8List(16).buffer;
     var view_a = new Float32List.view(array_buffer, 0, 4);