Lazy implementation of final variables.

tests/language/lazy_final2_test.dart

Index: tests/language/lazy_final2_test.dart
diff --git a/tests/language/string_escape1_negative_test.dart b/tests/language/lazy_final2_test.dart
similarity index 73%
copy from tests/language/string_escape1_negative_test.dart
copy to tests/language/lazy_final2_test.dart
index b9816b1206e18d93470679b9f75c531bc0bebca0..e422c300982a989713334fbc162ab3df2d2739a7 100644
--- a/tests/language/string_escape1_negative_test.dart
+++ b/tests/language/lazy_final2_test.dart
@@ -2,10 +2,9 @@
 // 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 that newlines cannot be escaped in library tags.
-
-#library('foo\
-');
+final x = (t) => t + 1;
 
 main() {
-}
+  Expect.equals(499, x(498));
+  Expect.equals(42, x(41));
+}