Merge tests for dart2js and VM using multi-tests.

tests/lib/mirrors/parameter_test.dart

Index: tests/lib/mirrors/parameter_test.dart
diff --git a/tests/lib/mirrors/parameter_test.dart b/tests/lib/mirrors/parameter_test.dart
index 7c538a773bf4b489e26420c77237b94aa0218a0c..4abd0cd7d27cee25f57768bf76acf4bf9efe0fe4 100644
--- a/tests/lib/mirrors/parameter_test.dart
+++ b/tests/lib/mirrors/parameter_test.dart
@@ -2,7 +2,13 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-/// Test of [ParameterMirror].
+// This tests uses the multi-test "ok" feature:
+// none: Desired behaviour, passing on the VM.
+// 01: Trimmed version for dart2js.
+//
+// TODO(rmacnak,ahe): Remove multi-test when VM and dart2js are on par.
+
+/** Test of [ParameterMirror]. */
 library test.parameter_test;
 
 @MirrorsUsed(targets: 'test.parameter_test', override: '*')
@@ -65,6 +71,9 @@ main() {
   expect('Class(s(B) in s(test.parameter_test), top-level)',
          barConstructor.returnType);
 
+  // dart2js stops testing here.
+  return;  /// 01: ok
+
   MethodMirror bazConstructor = constructors[const Symbol('B.baz')];
   expect('Method(s(B.baz) in s(B), constructor)', bazConstructor);
   expect('[Parameter(s(x) in s(B.baz), final,'