Adds WindowManagerManager to mus

components/mus/ws/window_manager_state.cc

Index: components/mus/ws/window_manager_state.cc
diff --git a/components/mus/ws/window_manager_state.cc b/components/mus/ws/window_manager_state.cc
new file mode 100644
index 0000000000000000000000000000000000000000..09dc5289519c74a8ce9f913936d55510829c90f0
--- /dev/null
+++ b/components/mus/ws/window_manager_state.cc
@@ -0,0 +1,41 @@
+// 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_state.h"
+
+#include "components/mus/ws/connection_manager.h"
+#include "components/mus/ws/server_window.h"
+
+namespace mus {
+namespace ws {
+
+WindowManagerState::WindowManagerState(WindowTreeHostImpl* tree_host)
+    : WindowManagerState(tree_host, false, 0u) {}
+
+WindowManagerState::WindowManagerState(WindowTreeHostImpl* tree_host,
+                                       uint32_t user_id)
+    : WindowManagerState(tree_host, true, user_id) {}
+
+WindowManagerState::~WindowManagerState() {}
+
+WindowManagerState::WindowManagerState(WindowTreeHostImpl* tree_host,
+                                       bool is_user_id_valid,
+                                       uint32_t user_id)
+    : tree_host_(tree_host),
+      is_user_id_valid_(is_user_id_valid),
+      user_id_(user_id) {
+  ConnectionManager* connection_manager = tree_host_->connection_manager();
+  root_.reset(connection_manager->CreateServerWindow(
+      RootWindowId(connection_manager->GetAndAdvanceNextHostId()),
+      ServerWindow::Properties()));
+  // Our root is always a child of the WindowTreeHostImpl's root. Do this
+  // before the WindowTree has been created so that the client doesn't get
+  // notified of the add, bounds change and visibility change.
+  root_->SetBounds(gfx::Rect(tree_host->root_window()->bounds().size()));
+  root_->SetVisible(true);
+  tree_host->root_window()->Add(root_.get());
+}
+
+}  // namespace ws
+}  // namespace mus