Introduce .isMalformed

tests/compiler/dart2js/semantic_visitor_test.dart

Index: tests/compiler/dart2js/semantic_visitor_test.dart
diff --git a/tests/compiler/dart2js/semantic_visitor_test.dart b/tests/compiler/dart2js/semantic_visitor_test.dart
index f8ea57fb2f6bdaa676552df3e6d6dc846313fd0a..72f93e1154fb18c6dd4d5fea9a9dfff54c5cc746 100644
--- a/tests/compiler/dart2js/semantic_visitor_test.dart
+++ b/tests/compiler/dart2js/semantic_visitor_test.dart
@@ -313,14 +313,14 @@ Future test(Set<VisitKind> unvisitedKinds,
     }
     var expectedVisits = test.expectedVisits;
     if (expectedVisits == null) {
-      Expect.isTrue(element.isErroneous,
+      Expect.isTrue(element.isMalformed,
           "Element '$method' expected to be have parse errors in:\n"
           "${library.compilationUnit.script.text}");
       return;
     } else if (expectedVisits is! List) {
       expectedVisits = [expectedVisits];
     }
-    Expect.isFalse(element.isErroneous,
+    Expect.isFalse(element.isMalformed,
         "Element '$method' is not expected to be have parse errors in:\n"
         "${library.compilationUnit.script.text}");