Create a RegisterViewAssociate method in ViewManager

services/ui/view_manager/tests/view_manager_test_base.cc

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "services/ui/view_manager/tests/view_manager_test_base.h"
+
+#include "base/run_loop.h"
+#include "mojo/public/cpp/application/application_test_base.h"
+#include "mojo/public/cpp/application/connect.h"
+#include "mojo/services/ui/views/interfaces/view_manager.mojom.h"
+#include "mojo/services/ui/views/interfaces/views.mojom.h"
+
+namespace view_manager {
+namespace test {
+
+ViewManagerTestBase::ViewManagerTestBase() : weak_factory_(this) {}
+
+ViewManagerTestBase::~ViewManagerTestBase() {}
+
+void ViewManagerTestBase::SetUp() {
+  mojo::test::ApplicationTestBase::SetUp();
+  quit_message_loop_callback_ =
+      base::Bind(&ViewManagerTestBase::QuitMessageLoopCallback,
+                 weak_factory_.GetWeakPtr());
+}
+
+void ViewManagerTestBase::QuitMessageLoopCallback() {
+  base::MessageLoop::current()->Quit();
+}
+
+void ViewManagerTestBase::KickMessageLoop() {
+  base::MessageLoop::current()->PostDelayedTask(
+      FROM_HERE, quit_message_loop_callback_, kDefaultMessageDelay);
+  base::MessageLoop::current()->Run();
+}
+
+}  // namespace test
+}  // namespace view_manager