Converted Observatory refs elements

runtime/observatory/tests/observatory_ui/mocks/objects/instructions.dart

Index: runtime/observatory/tests/observatory_ui/mocks/objects/instructions.dart
diff --git a/runtime/observatory/tests/observatory_ui/mocks/objects/instructions.dart b/runtime/observatory/tests/observatory_ui/mocks/objects/instructions.dart
new file mode 100644
index 0000000000000000000000000000000000000000..f50b011da8e939ed6b5785a89d619fff786c9acc
--- /dev/null
+++ b/runtime/observatory/tests/observatory_ui/mocks/objects/instructions.dart
@@ -0,0 +1,13 @@
+// Copyright (c) 2016, 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.
+
+part of mocks;
+
+class InstructionsRefMock implements M.InstructionsRef {
+  final String id;
+  final M.CodeRef code;
+  const InstructionsRefMock({this.id: 'instructions-id',
+                             this.code: const CodeRefMock(
+                                        name: 'instruction-ref-code-ref')});
+}