Emit declarations for typedefs that are needed by reflection.

tests/lib/mirrors/typedef_declaration_test.dart

Index: tests/lib/mirrors/typedef_declaration_test.dart
diff --git a/tests/lib/mirrors/typedef_declaration_test.dart b/tests/lib/mirrors/typedef_declaration_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..f039c1b6a2c75679b226f349f62e05c38bcc575d
--- /dev/null
+++ b/tests/lib/mirrors/typedef_declaration_test.dart
@@ -0,0 +1,29 @@
+// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
+// 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.
+
+library test;
+
+import 'package:expect/expect.dart';
+
+@MirrorsUsed(targets: "Foo")
+import 'dart:mirrors';
+
+typedef int Foo(String x);
+typedef int Bar();
+
+main() {
+  LibraryMirror thisLibrary = currentMirrorSystem().findLibrary(#test);
+
+  Mirror fooMirror = thisLibrary.declarations[#Foo];
+
+  Expect.isTrue(fooMirror != null, 'Foo not found.');
+  Expect.isTrue(thisLibrary.declarations[#Foo] is TypedefMirror,
+                'TypedefMirror expected, found $fooMirror');
+
+  // The following code does not currenty work on the VM, because it does not
+  // support MirrorsUsed (see dartbug.com/16048).
+  Mirror barMirror = thisLibrary.declarations[#Bar];              /// 01: ok
+  Expect.isTrue(barMirror == null,                                /// 01: continued
+                'Bar should not be emitted due to MirrorsUsed.'); /// 01: continued
+}