dart2js: create a 'types' table for each deferred unit.

tests/language/deferred_function_type_lib.dart

Index: tests/language/deferred_function_type_lib.dart
diff --git a/tests/compiler/dart2js_extra/22487_test.dart b/tests/language/deferred_function_type_lib.dart
similarity index 65%
copy from tests/compiler/dart2js_extra/22487_test.dart
copy to tests/language/deferred_function_type_lib.dart
index 4bf5426b20e4dc4508044fb5aa0884afe5082e4a..1f0e610aac59572ef332c77ebb2d2acdac5ab189 100644
--- a/tests/compiler/dart2js_extra/22487_test.dart
+++ b/tests/language/deferred_function_type_lib.dart
@@ -2,12 +2,19 @@
 // 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.
 
-// Regression test for http://dartbug.com/22487
-
 import 'package:expect/expect.dart';
 
-divIsInt(a, b) => (a / b) is int;
+class T {
+  A foo(int x) {}
+}
+
+class A{}
+
+typedef A F(int x);
+
+use(x) => x;
 
-main() {
-  Expect.isFalse((divIsInt)(10, 3));
+runTest() {
+  use(new A());
+  Expect.isTrue(new T().foo is F);
 }