Compute frontend/backend specific constants.

tests/language/const_init2_test.dart

Index: tests/language/const_init2_test.dart
diff --git a/tests/compiler/dart2js/path with spaces/file with spaces.dart b/tests/language/const_init2_test.dart
similarity index 56%
copy from tests/compiler/dart2js/path with spaces/file with spaces.dart
copy to tests/language/const_init2_test.dart
index b0cc20402f823946fa54730f2bb581c9bf58365a..e6e1c4eb985d525457638b85dfc319549ce9cbd3 100644
--- a/tests/compiler/dart2js/path with spaces/file with spaces.dart	
+++ b/tests/language/const_init2_test.dart
@@ -2,8 +2,10 @@
 // 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.
 
-import 'library space/lib with spaces.dart';
+const double c = 0.0; /// 01: ok
+const double d = 0; /// 02: static type warning, checked mode compile-time error
 
 main() {
-  if (foo() != 499) throw "bad value";
-}
+  print(c); /// 01: continued
+  print(d); /// 02: continued
+}