Enhance chrome.app.window API with title property

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

 // 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.
 
 #include "chrome/browser/ui/ash/launcher/extension_app_window_launcher_controller.h"
 
 #include "ash/aura/wm_window_aura.h"
 #include "ash/common/shelf/shelf_delegate.h"
 #include "ash/common/wm_shell.h"
 #include "ash/common/wm_window_property.h"
@@ skipping 23 matching lines @@
   std::string launch_id;
   if (app_window->show_in_shelf() || app_window->window_type_is_panel()) {
     if (!app_window->window_key().empty())
       launch_id = app_window->window_key();
     else
       launch_id = base::StringPrintf("%d", app_window->session_id().id());
   }
   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();
   std::string launch_id = GetLaunchId(app_window);
   return app_id + launch_id;
 }
 
 }  // namespace
 
 ExtensionAppWindowLauncherController::ExtensionAppWindowLauncherController(
@@ skipping 95 matching lines @@
         app_controller_iter->second;
     DCHECK(controller->app_id() == app_id);
     shelf_id = controller->shelf_id();
     controller->AddAppWindow(app_window);
   } else {
     LauncherItemController::Type type =
         app_window->window_type_is_panel()
             ? LauncherItemController::TYPE_APP_PANEL
             : 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.
     shelf_id =
         ash::WmShell::Get()->shelf_delegate()->GetShelfIDForAppIDAndLaunchID(
             app_id, launch_id);
 
     if (shelf_id == 0) {
       shelf_id = owner()->CreateAppLauncherItem(controller, app_id, status);
       // Restore any existing app icon and flag as set.
@@ skipping 52 matching lines @@
   WindowToAppShelfIdMap::iterator window_iter =
       window_to_app_shelf_id_map_.find(window);
   if (window_iter == window_to_app_shelf_id_map_.end())
     return nullptr;
   AppControllerMap::iterator app_controller_iter =
       app_controller_map_.find(window_iter->second);
   if (app_controller_iter == app_controller_map_.end())
     return nullptr;
   return app_controller_iter->second;
 }