Enhance chrome.app.window API with title property

chrome/browser/ui/ash/launcher/chrome_launcher_controller_mus.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_CHROME_LAUNCHER_CONTROLLER_MUS_H_
 #define CHROME_BROWSER_UI_ASH_LAUNCHER_CHROME_LAUNCHER_CONTROLLER_MUS_H_
 
 #include <map>
 #include <memory>
 #include <string>
@@ skipping 62 matching lines @@
   BrowserShortcutLauncherItemController*
   GetBrowserShortcutLauncherItemController() override;
   LauncherItemController* GetLauncherItemController(
       const ash::ShelfID id) override;
   bool ShelfBoundsChangesProbablyWithUser(
       ash::WmShelf* shelf,
       const AccountId& account_id) const override;
   void OnUserProfileReadyToSwitch(Profile* profile) override;
   ArcAppDeferredLauncherController* GetArcDeferredLauncher() override;
   const std::string& GetLaunchIDForShelfID(ash::ShelfID id) override;
+  const std::string& GetTitleForShelfID(ash::ShelfID id) override;
 
   // AppIconLoaderDelegate:
   void OnAppImageUpdated(const std::string& app_id,
                          const gfx::ImageSkia& image) override;
 
  private:
   // Pin the items set in the current profile's preferences.
   void PinAppsFromPrefs();
 
   std::map<std::string, std::unique_ptr<ChromeShelfItemDelegate>>
       app_id_to_item_delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeLauncherControllerMus);
 };
 
 #endif  // CHROME_BROWSER_UI_ASH_LAUNCHER_CHROME_LAUNCHER_CONTROLLER_MUS_H_