Support new library/import syntax

tests/language/prefix_new_test.dart

Index: tests/language/prefix_new_test.dart
===================================================================
--- tests/language/prefix_new_test.dart	(revision 0)
+++ tests/language/prefix_new_test.dart	(revision 0)
@@ -0,0 +1,12 @@
+// Copyright (c) 2012, 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.
+
+library PrefixTest;
+
+import "prefix_test1.dart";
+
+
+main() {
+  Expect.equals(Prefix.getSource(), Prefix.getImport() + 1);
+}