Unparse new library syntax.

dart/tests/compiler/dart2js/parser_helper.dart

Index: dart/tests/compiler/dart2js/parser_helper.dart
diff --git a/dart/tests/compiler/dart2js/parser_helper.dart b/dart/tests/compiler/dart2js/parser_helper.dart
index 37afdbe20ff6ee6d297cbd468f0cfde82c4e34f7..523e1f5dc9e2bfe891e5b38b00f9c87775e659f3 100644
--- a/dart/tests/compiler/dart2js/parser_helper.dart
+++ b/dart/tests/compiler/dart2js/parser_helper.dart
@@ -75,6 +75,10 @@ Link<Element> parseUnit(String text, Compiler compiler,
   return unit.localMembers;
 }
 
+NodeList fullParseUnit(String source) {
+  return parseBodyCode(source, (parser, tokens) => parser.parseUnit(tokens));
+}
+
 // TODO(ahe): We define this method to avoid having to import
 // the scanner in the tests. We should move SourceString to another
 // location instead.