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

mash/catalog_viewer/catalog_viewer.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 "mash/catalog_viewer/catalog_viewer.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/bind.h"
@@ skipping 164 matching lines @@
     base::MessageLoop::current()->QuitWhenIdle();
 }
 
 void CatalogViewer::Initialize(shell::Connector* connector,
                                const shell::Identity& identity,
                                uint32_t id) {
   connector_ = connector;
   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 CatalogViewer::AcceptConnection(shell::Connection* connection) {
   connection->AddInterface<mojom::Launchable>(this);
   return true;
 }
 
 void CatalogViewer::Launch(uint32_t what, mojom::LaunchMode how) {
   bool reuse = how == mojom::LaunchMode::REUSE ||
                how == mojom::LaunchMode::DEFAULT;
@@ skipping 11 matching lines @@
   windows_.push_back(window);
 }
 
 void CatalogViewer::Create(shell::Connection* connection,
                            mojom::LaunchableRequest request) {
   bindings_.AddBinding(this, std::move(request));
 }
 
 }  // namespace catalog_viewer
 }  // namespace mash