Ensure that parser throws an error when parsing x is! T with malformed type T.

tests/language/isnot_malformed_type_test.dart

Index: tests/language/isnot_malformed_type_test.dart
diff --git a/compiler/javatests/com/google/dart/compiler/end2end/inc/my.unprefixed.app.dart b/tests/language/isnot_malformed_type_test.dart
similarity index 55%
copy from compiler/javatests/com/google/dart/compiler/end2end/inc/my.unprefixed.app.dart
copy to tests/language/isnot_malformed_type_test.dart
index b34d3fe30eebb5a4c764663356023f44ce7ac021..d0dabc00e4fe2a5f02d81207062f61ddb50a741d 100644
--- a/compiler/javatests/com/google/dart/compiler/end2end/inc/my.unprefixed.app.dart
+++ b/tests/language/isnot_malformed_type_test.dart
@@ -1,17 +1,12 @@
 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // 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.
+// Parser throws an error when parsing x is! T with malformed type T.
 
-import "some.prefixable.lib.dart";
-
-class Unprefix {
-  static final int foo = 43;
-
-  static getSource() {
-    return foo;
-  }
-
-  static getImport() {
-    return Prefix.foo;
-  }
+f(obj) {
+  return (obj is !Baz);  // 'Baz' is not loaded error.
 }
+
+main () {
+  f(null);  /// 01: runtime error
+}