Revert of Revert "Typecheck JS files for chrome://extensions"

chrome/browser/ui/webui/extensions/chromeos/kiosk_apps_handler.cc

 // Copyright 2013 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/webui/extensions/chromeos/kiosk_apps_handler.h"
 
 #include <algorithm>
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 24 matching lines @@
 
 // Populates app info dictionary with |app_data|.
 void PopulateAppDict(const KioskAppManager::App& app_data,
                      base::DictionaryValue* app_dict) {
   std::string icon_url("chrome://theme/IDR_APP_DEFAULT_ICON");
 
   // TODO(xiyuan): Replace data url with a URLDataSource.
   if (!app_data.icon.isNull())
     icon_url = webui::GetBitmapDataUrl(*app_data.icon.bitmap());
 
+  // The items which are to be written into app_dict are also described in
+  // chrome/browser/resources/extensions/chromeos/kiosk_app_list.js in @typedef
+  // for AppDict. Please update it whenever you add or remove any keys here.
   app_dict->SetString("id", app_data.app_id);
   app_dict->SetString("name", app_data.name);
   app_dict->SetString("iconURL", icon_url);
   app_dict->SetBoolean(
       "autoLaunch",
       KioskAppManager::Get()->GetAutoLaunchApp() == app_data.app_id &&
       (KioskAppManager::Get()->IsAutoLaunchEnabled() ||
           KioskAppManager::Get()->IsAutoLaunchRequested()));
   app_dict->SetBoolean("isLoading", app_data.is_loading);
 }
@@ skipping 289 matching lines @@
 
 void KioskAppsHandler::ShowError(const std::string& app_id) {
   base::StringValue app_id_value(app_id);
   web_ui()->CallJavascriptFunction("extensions.KioskAppsOverlay.showError",
                                    app_id_value);
 
   kiosk_app_manager_->RemoveApp(app_id);
 }
 
 }  // namespace chromeos