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

chrome/browser/ui/views/chrome_browser_main_extra_parts_views.cc

 // Copyright (c) 2012 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 "chrome/browser/ui/views/chrome_browser_main_extra_parts_views.h"
 
 #include "chrome/browser/ui/views/chrome_constrained_window_views_client.h"
 #include "chrome/browser/ui/views/chrome_views_delegate.h"
 #include "components/constrained_window/constrained_window_views.h"
 
@@ skipping 32 matching lines @@
 #if defined(USE_AURA) && !defined(OS_CHROMEOS)
   display::Screen::SetScreenInstance(views::CreateDesktopScreen());
 #endif
 }
 
 void ChromeBrowserMainExtraPartsViews::PreProfileInit() {
 #if defined(USE_AURA) && defined(MOJO_SHELL_CLIENT)
   content::MojoShellConnection* mojo_shell_connection =
       content::MojoShellConnection::Get();
   if (mojo_shell_connection && mojo_shell_connection->UsingExternalShell()) {
-    views::WindowManagerConnection::Create(
+    window_manager_connection_ = views::WindowManagerConnection::Create(
         mojo_shell_connection->GetConnector(),
         mojo_shell_connection->GetIdentity());
   }
-#endif
+#endif  // defined(USE_AURA) && defined(MOJO_SHELL_CLIENT)
+  ChromeBrowserMainExtraParts::PreProfileInit();
 }