Enhance chrome.app.window API with title property

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

Index: chrome/browser/ui/ash/launcher/app_window_launcher_item_controller.h
diff --git a/chrome/browser/ui/ash/launcher/app_window_launcher_item_controller.h b/chrome/browser/ui/ash/launcher/app_window_launcher_item_controller.h
index b024dd806ac326b16279afbcce1f876a0c67371f..f651d5d34148833bdecac99bd5662645a0cfed11 100644
--- a/chrome/browser/ui/ash/launcher/app_window_launcher_item_controller.h
+++ b/chrome/browser/ui/ash/launcher/app_window_launcher_item_controller.h
@@ -44,6 +44,7 @@ class AppWindowLauncherItemController : public LauncherItemController,
 
   const std::string& app_id() const { return app_id_; }
   const std::string& launch_id() const { return launch_id_; }
+  const std::string& title() const { return title_; }
 
   // LauncherItemController overrides:
   bool IsOpen() const override;
@@ -77,6 +78,7 @@ class AppWindowLauncherItemController : public LauncherItemController,
   AppWindowLauncherItemController(Type type,
                                   const std::string& app_id,
                                   const std::string& launch_id,
+                                  const std::string& title,
                                   ChromeLauncherController* controller);
 
   // Called when app window is removed from controller.
@@ -111,6 +113,9 @@ class AppWindowLauncherItemController : public LauncherItemController,
   // uniquely identify each shelf item that has the same app_id.
   const std::string launch_id_;
 
+  // Title of the window that has its own icon in the shelf.
+  const std::string title_;
+
   // Scoped list of observed windows (for removal on destruction)
   ScopedObserver<aura::Window, aura::WindowObserver> observed_windows_;