Routes calls to WM through WS

mandoline/ui/phone_ui/phone_browser_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 "mandoline/ui/phone_ui/phone_browser_application_delegate.h"
 
 #include "base/command_line.h"
 #include "components/mus/public/cpp/window.h"
 #include "components/mus/public/cpp/window_tree_connection.h"
 #include "components/mus/public/cpp/window_tree_host_factory.h"
@@ skipping 29 matching lines @@
   app_ = app;
 
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   for (const auto& arg : command_line->GetArgs()) {
     GURL url(arg);
     if (url.is_valid()) {
       default_url_ = url.spec();
       break;
     }
   }
-  mus::CreateSingleWindowTreeHost(app_, this, &host_);
+  mus::CreateSingleWindowTreeHost(app_, this, &host_, nullptr);
 }
 
 bool PhoneBrowserApplicationDelegate::ConfigureIncomingConnection(
     mojo::ApplicationConnection* connection) {
   connection->AddService<LaunchHandler>(this);
   return true;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // PhoneBrowserApplicationDelegate, LaunchHandler implementation:
@@ skipping 64 matching lines @@
 // PhoneBrowserApplicationDelegate,
 //       mojo::InterfaceFactory<LaunchHandler> implementation:
 
 void PhoneBrowserApplicationDelegate::Create(
     mojo::ApplicationConnection* connection,
     mojo::InterfaceRequest<LaunchHandler> request) {
   launch_handler_bindings_.AddBinding(this, request.Pass());
 }
 
 }  // namespace mandoline