Enhance chrome.app.window API with title property

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

Index: chrome/browser/ui/ash/launcher/launcher_item_controller.h
diff --git a/chrome/browser/ui/ash/launcher/launcher_item_controller.h b/chrome/browser/ui/ash/launcher/launcher_item_controller.h
index bcbe71976bead0b0c159394f65996ebb8c47526a..eb75cdb7feda9a5d61ff634e18cdd9a22814a6c6 100644
--- a/chrome/browser/ui/ash/launcher/launcher_item_controller.h
+++ b/chrome/browser/ui/ash/launcher/launcher_item_controller.h
@@ -43,6 +43,7 @@ class LauncherItemController : public ash::ShelfItemDelegate {
   LauncherItemController(Type type,
                          const std::string& app_id,
                          const std::string& launch_id,
+                         const std::string& title,
                          ChromeLauncherController* launcher_controller);
   ~LauncherItemController() override;
 
@@ -51,6 +52,7 @@ class LauncherItemController : public ash::ShelfItemDelegate {
   void set_shelf_id(ash::ShelfID id) { shelf_id_ = id; }
   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_; }
   ChromeLauncherController* launcher_controller() const {
     return launcher_controller_;
   }
@@ -96,6 +98,9 @@ class LauncherItemController : public ash::ShelfItemDelegate {
   // 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_;
+
   // A unique id assigned by the shelf model for the shelf item.
   ash::ShelfID shelf_id_;