mash: Fix shelf window property use in Chrome.

chrome/browser/ui/ash/launcher/settings_window_observer.h

+// 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.
+
+#ifndef CHROME_BROWSER_UI_ASH_LAUNCHER_SETTINGS_WINDOW_OBSERVER_H_
+#define CHROME_BROWSER_UI_ASH_LAUNCHER_SETTINGS_WINDOW_OBSERVER_H_
+
+#include "base/macros.h"
+#include "chrome/browser/ui/settings_window_manager_observer.h"
+#include "services/ui/public/cpp/window_tracker.h"
+#include "ui/aura/window_tracker.h"
+
+// Sets the window title and shelf item properties for settings windows.
+// Settings windows are not handled by BrowserShortcutLauncherItemController.
+class SettingsWindowObserver : public chrome::SettingsWindowManagerObserver {
+ public:
+  SettingsWindowObserver();
+  ~SettingsWindowObserver() override;
+
+  // SettingsWindowManagerObserver:
+  void OnNewSettingsWindow(Browser* settings_browser) override;
+
+ private:
+  // Window trackers that rename the Settings window in classic ash and mash.
+  std::unique_ptr<aura::WindowTracker> aura_window_tracker_;
+  std::unique_ptr<ui::WindowTracker> ui_window_tracker_;
+
+  DISALLOW_COPY_AND_ASSIGN(SettingsWindowObserver);
+};
+
+#endif  // CHROME_BROWSER_UI_ASH_LAUNCHER_SETTINGS_WINDOW_OBSERVER_H_