views/mus: Have explicit ownership of views::WindowManagerConnection.

mash/example/views_examples/views_examples_application_delegate.cc

 // Copyright 2015 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 "mash/example/views_examples/views_examples_application_delegate.h"
 
 #include "services/shell/public/cpp/connection.h"
 #include "services/shell/public/cpp/connector.h"
 #include "ui/views/examples/example_base.h"
 #include "ui/views/examples/examples_window.h"
 #include "ui/views/mus/aura_init.h"
 #include "ui/views/mus/window_manager_connection.h"
 
 ViewsExamplesApplicationDelegate::ViewsExamplesApplicationDelegate() {}
 
 ViewsExamplesApplicationDelegate::~ViewsExamplesApplicationDelegate() {
 }
 
 void ViewsExamplesApplicationDelegate::Initialize(
     shell::Connector* connector,
     const shell::Identity& identity,
     uint32_t id) {
   tracing_.Initialize(connector, identity.name());
   aura_init_.reset(new views::AuraInit(connector, "views_mus_resources.pak"));
-  views::WindowManagerConnection::Create(connector, identity);
+  window_manager_connection_ =
+      views::WindowManagerConnection::Create(connector, identity);
 }
 
 bool ViewsExamplesApplicationDelegate::AcceptConnection(
     shell::Connection* connection) {
   connection->AddInterface<mash::mojom::Launchable>(this);
   return true;
 }
 
 void ViewsExamplesApplicationDelegate::Launch(uint32_t what,
                                               mash::mojom::LaunchMode how) {
   views::examples::ShowExamplesWindow(views::examples::QUIT_ON_CLOSE,
                                       nullptr, nullptr);
 }
 
 void ViewsExamplesApplicationDelegate::Create(
     shell::Connection* connection,
     mash::mojom::LaunchableRequest request) {
   bindings_.AddBinding(this, std::move(request));
 }