| // Copyright 2021 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "chrome/browser/ui/lacros/window_utility.h" |
| |
| #include "ui/aura/window.h" |
| #include "ui/aura/window_tree_host.h" |
| |
| namespace lacros_window_utility { |
| |
| std::string GetRootWindowUniqueId(aura::Window* window) { |
| DCHECK(window); |
| |
| // On desktop aura there is one WindowTreeHost per top-level window. |
| aura::WindowTreeHost* window_tree_host = window->GetRootWindow()->GetHost(); |
| DCHECK(window_tree_host); |
| |
| return window_tree_host->GetUniqueId(); |
| } |
| |
| } // namespace lacros_window_utility |
