Port two completion contributors for use by plugins

pkg/analyzer_plugin/test/utilities/completion/test_all.dart

Index: pkg/analyzer_plugin/test/utilities/completion/test_all.dart
diff --git a/pkg/analyzer_plugin/test/utilities/completion/test_all.dart b/pkg/analyzer_plugin/test/utilities/completion/test_all.dart
new file mode 100644
index 0000000000000000000000000000000000000000..5f06b3a0cd517b3995aa2d21b0495a1b563ce888
--- /dev/null
+++ b/pkg/analyzer_plugin/test/utilities/completion/test_all.dart
@@ -0,0 +1,16 @@
+// Copyright (c) 2017, 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.
+
+import 'package:test_reflective_loader/test_reflective_loader.dart';
+
+import 'inherited_reference_contributor_test.dart'
+    as inherited_reference_contributor_test;
+import 'type_member_contributor_test.dart' as type_member_contributor_test;
+
+main() {
+  defineReflectiveSuite(() {
+    inherited_reference_contributor_test.main();
+    type_member_contributor_test.main();
+  }, name: 'subscriptions');
+}