Add mirrors tests

test/codegen/lib/mirrors/model.dart

+// Copyright (c) 2013, 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.model;
+
+var accessorA;
+
+var accessorB;
+
+var accessorC;
+
+var fieldC;
+
+class A {
+  var field;
+  instanceMethod(x) => 'A:instanceMethod($x)';
+  get accessor => 'A:get accessor';
+  set accessor(x) {
+    accessorA = x;
+  }
+  aMethod() => 'aMethod';
+}
+
+class B extends A {
+  get field => 'B:get field';
+  instanceMethod(x) => 'B:instanceMethod($x)';
+  get accessor => 'B:get accessor';
+  set accessor(x) {
+    accessorB = x;
+  }
+  bMethod() => 'bMethod';
+}
+
+class C extends B {
+  set field(x) {
+    fieldC = x;
+  }
+  instanceMethod(x) => 'C:instanceMethod($x)';
+  get accessor => 'C:get accessor';
+  set accessor(x) {
+    accessorC = x;
+  }
+  cMethod() => 'cMethod';
+}