Adds WindowManagerManager to mus

components/mus/ws/window_manager_factory_service.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 "components/mus/ws/window_manager_factory_service.h"
 
 #include "components/mus/ws/connection_manager.h"
 #include "components/mus/ws/window_tree_impl.h"
 
 namespace mus {
 namespace ws {
 
 WindowManagerFactoryService::WindowManagerFactoryService(
+    WindowManagerFactoryRegistry* registry,
+    uint32_t user_id,
     mojo::InterfaceRequest<mojom::WindowManagerFactoryService> request)
-    : binding_(this, std::move(request)) {}
+    : registry_(registry),
+      user_id_(user_id),
+      binding_(this, std::move(request)) {}
 
 WindowManagerFactoryService::~WindowManagerFactoryService() {}
 
 void WindowManagerFactoryService::SetWindowManagerFactory(
     mojom::WindowManagerFactoryPtr factory) {
   window_manager_factory_ = std::move(factory);
+  registry_->OnWindowManagerFactorySet();
+  binding_.set_connection_error_handler(base::Bind(
+      &WindowManagerFactoryService::OnConnectionLost, base::Unretained(this)));
+}
+
+void WindowManagerFactoryService::OnConnectionLost() {
+  registry_->OnWindowManagerFactoryConnectionLost(this);
 }
 
 }  // namespace ws
 }  // namespace mus