Check against the correct type when decoding runtime types.

tests/lib/mirrors/type_mirror_for_type_test.dart

Index: tests/lib/mirrors/type_mirror_for_type_test.dart
diff --git a/tests/lib/mirrors/type_mirror_for_type_test.dart b/tests/lib/mirrors/type_mirror_for_type_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..3c3d53a3f16bf77382deb8772829bda8f9037bdc
--- /dev/null
+++ b/tests/lib/mirrors/type_mirror_for_type_test.dart
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+// 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.
+
+// Regression test for the dart2js implementation of runtime types.
+
+library test.type_mirror_for_type;
+
+import 'package:expect/expect.dart';
+
+@MirrorsUsed(targets: 'test.type_mirror_for_type')
+import 'dart:mirrors';
+
+class C<T> {}
+
+class X {
+  Type foo() {}
+}
+
+main() {
+  // Make sure that we need a type test against the runtime representation of
+  // [Type].
+  var a = (new DateTime.now().millisecondsSinceEpoch != 42)
+      ? new C<Type>() : new C<int>();
+  print (a is C<Type>);
+
+  var typeMirror = reflectType(X);
+  var declarationMirror = typeMirror.declarations[#foo];
+  // Test that the runtime type implementation does not confuse the runtime type
+  // representation of [Type] with an actual value of type [Type] when analyzing
+  // the return type of [foo].
+  Expect.equals(reflectType(Type), declarationMirror.returnType);
+}