Fix build breakage.

dart/tests/compiler/dart2js_extra/compile_time_constant4_test.dart

Index: dart/tests/compiler/dart2js_extra/compile_time_constant4_test.dart
diff --git a/dart/tests/compiler/dart2js_extra/compile_time_constant4_test.dart b/dart/tests/compiler/dart2js_extra/compile_time_constant4_test.dart
index 613c6e31d9752cd4a757e16366a2a994a5f2d31f..5207da7a49271de067a7e9183bc9cb8d805feb10 100644
--- a/dart/tests/compiler/dart2js_extra/compile_time_constant4_test.dart
+++ b/dart/tests/compiler/dart2js_extra/compile_time_constant4_test.dart
@@ -5,7 +5,7 @@
 final x = "foo";
 final y = "foo";
 final g1 = x
-  + "bar"  // TODO(lrn) - see below: 01: compile-time error
+  + "bar"  /// 01: compile-time error
 ;
 final g2 = x
   + null   /// 02: compile-time error
@@ -33,9 +33,9 @@ final g9 = x == y;
 use(x) => x;
 
 main() {
-  Expect.equals("foobar", g1);
+  Expect.equals("foo", g1);
   Expect.isTrue(g9);
-  use(g1);  // TODO(lrn): Should fail when String.operator+ is removed.
+  use(g1);
   use(g2);
   use(g3);
   use(g4);