Include constants in deferred computation.

tests/compiler/dart2js/serialization/test_data.dart

Index: tests/compiler/dart2js/serialization/test_data.dart
diff --git a/tests/compiler/dart2js/serialization/test_data.dart b/tests/compiler/dart2js/serialization/test_data.dart
index c32be573e313f2b9b905e742902e4ed9ea369d26..20f39e8c5b9abffd5828450bd1522eff21e551a1 100644
--- a/tests/compiler/dart2js/serialization/test_data.dart
+++ b/tests/compiler/dart2js/serialization/test_data.dart
@@ -643,6 +643,23 @@ main() {}
 import 'dart:indexed_db';
 ''',
   }),
+
+  const Test('Deferred static access', const {},
+      preserializedSourceFiles: const {
+    'main.dart': '''
+import 'b.dart' deferred as prefix;
+
+main() => prefix.loadLibrary().then((_) => prefix.test2());
+''',
+    'b.dart': '''
+test2() => x;
+var x = const ConstClass(const ConstClass(1));
+class ConstClass {
+  final x;
+  const ConstClass(this.x);
+}
+''',
+  }),
 ];
 
 class Test {