Enhance chrome.app.window API with title property

chrome/browser/ui/ash/launcher/extension_app_window_launcher_controller.cc

Index: chrome/browser/ui/ash/launcher/extension_app_window_launcher_controller.cc
diff --git a/chrome/browser/ui/ash/launcher/extension_app_window_launcher_controller.cc b/chrome/browser/ui/ash/launcher/extension_app_window_launcher_controller.cc
index 138cec71e67b9313cdfbe6c35c00f69db23076ab..73a24e7ef60340887eda2450632f4596747d9028 100644
--- a/chrome/browser/ui/ash/launcher/extension_app_window_launcher_controller.cc
+++ b/chrome/browser/ui/ash/launcher/extension_app_window_launcher_controller.cc
@@ -41,6 +41,13 @@ std::string GetLaunchId(AppWindow* app_window) {
   return launch_id;
 }
 
+std::string GetTitle(AppWindow* app_window) {
+  if (app_window->show_in_shelf())
+    return app_window->title();
+  else
+    return base::EmptyString();
+}
+
 std::string GetAppShelfId(AppWindow* app_window) {
   // Set app_shelf_id value to app_id and then append launch_id.
   std::string app_id = app_window->extension_id();
@@ -167,9 +174,10 @@ void ExtensionAppWindowLauncherController::RegisterApp(AppWindow* app_window) {
   } else {
     LauncherItemController::Type type = LauncherItemController::TYPE_APP;
     std::string launch_id = GetLaunchId(app_window);
+    std::string title = GetTitle(app_window);
     ExtensionAppWindowLauncherItemController* controller =
         new ExtensionAppWindowLauncherItemController(type, app_id, launch_id,
-                                                     owner());
+                                                     title, owner());
     controller->AddAppWindow(app_window);
     // If there is already a shelf id mapped to this app_shelf_id (e.g. pinned),
     // use that shelf item.