Handle constants that mix eager and deferred types.

dart/tests/lib/async/deferred/deferred_constant_library.dart

Index: dart/tests/lib/async/deferred/deferred_constant_library.dart
diff --git a/dart/tests/compiler/dart2js_extra/deferred/deferred_function_library.dart b/dart/tests/lib/async/deferred/deferred_constant_library.dart
similarity index 57%
copy from dart/tests/compiler/dart2js_extra/deferred/deferred_function_library.dart
copy to dart/tests/lib/async/deferred/deferred_constant_library.dart
index 0eaebc76885ec9905d49685b685f0486f3a54f3b..457c37e880e005d3b1a91b3a7d54562e62b675c1 100644
--- a/dart/tests/compiler/dart2js_extra/deferred/deferred_function_library.dart
+++ b/dart/tests/lib/async/deferred/deferred_constant_library.dart
@@ -2,12 +2,11 @@
 // 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.
 
-// Imported by deferred_function_test.dart and
-// deferred_semantics_test.dart.
+library deferred_constant_library;
 
-library deferred_function_library;
+class Constant {
+  final value;
+  const Constant(this.value);
 
-foo(x) {
-  print('foo($x)');
-  return 42;
+  operator==(other) => other is Constant && value == other.value;
 }