Routes calls to WM through WS

components/mus/public/cpp/lib/window_tree_host_factory.cc

Index: components/mus/public/cpp/lib/window_tree_host_factory.cc
diff --git a/components/mus/public/cpp/lib/window_tree_host_factory.cc b/components/mus/public/cpp/lib/window_tree_host_factory.cc
index e63c604230722122d5189072bacb5f2fb22c7cb2..092aa8c63e7c454aeb3b142b1e42da36dc19da38 100644
--- a/components/mus/public/cpp/lib/window_tree_host_factory.cc
+++ b/components/mus/public/cpp/lib/window_tree_host_factory.cc
@@ -13,24 +13,26 @@ namespace mus {
 void CreateWindowTreeHost(mojom::WindowTreeHostFactory* factory,
                           mojom::WindowTreeHostClientPtr host_client,
                           WindowTreeDelegate* delegate,
-                          mojom::WindowTreeHostPtr* host) {
+                          mojom::WindowTreeHostPtr* host,
+                          mojom::WindowManagerPtr window_manager) {
   mojom::WindowTreeClientPtr tree_client;
   WindowTreeConnection::Create(
       delegate, GetProxy(&tree_client),
       WindowTreeConnection::CreateType::DONT_WAIT_FOR_EMBED);
   factory->CreateWindowTreeHost(GetProxy(host), host_client.Pass(),
-                                tree_client.Pass());
+                                tree_client.Pass(), window_manager.Pass());
 }
 
 void CreateSingleWindowTreeHost(mojo::ApplicationImpl* app,
                                 WindowTreeDelegate* delegate,
-                                mojom::WindowTreeHostPtr* host) {
+                                mojom::WindowTreeHostPtr* host,
+                                mojom::WindowManagerPtr window_manager) {
   mojom::WindowTreeHostFactoryPtr factory;
   mojo::URLRequestPtr request(mojo::URLRequest::New());
   request->url = "mojo:mus";
   app->ConnectToService(request.Pass(), &factory);
   CreateWindowTreeHost(factory.get(), mojom::WindowTreeHostClientPtr(),
-                       delegate, host);
+                       delegate, host, window_manager.Pass());
 }
 
 }  // namespace mus