Retrieve the list of keyboard layouts for public sessions async

chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc

 // Copyright (c) 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/chromeos/login/signin_screen_handler.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 62 matching lines @@
 #include "third_party/cros_system_api/dbus/service_constants.h"
 #include "ui/base/webui/web_ui_util.h"
 #include "ui/gfx/image/image.h"
 #include "ui/gfx/image/image_skia.h"
 
 #if defined(USE_AURA)
 #include "ash/shell.h"
 #include "ash/wm/lock_state_controller.h"
 #endif
 
-using content::BrowserThread;
-
 namespace {
 
 // Max number of users to show.
 const size_t kMaxUsers = 18;
 
 // Timeout to delay first notification about offline state for a
 // current network.
 const int kOfflineTimeoutSec = 5;
 
 // Timeout used to prevent infinite connecting to a flaky network.
@@ skipping 1191 matching lines @@
       base::Bind(&SigninScreenHandler::CallJS<double, std::string>,
                  base::Unretained(this),
                  "login.GaiaSigninScreen.setAuthenticatedUserEmail",
                  attempt_token),
       Profile::FromWebUI(web_ui())->GetRequestContext()));
 }
 
 void SigninScreenHandler::HandleGetPublicSessionKeyboardLayouts(
     const std::string& user_id,
     const std::string& locale) {
+  GetKeyboardLayoutsForLocale(
+      base::Bind(&SigninScreenHandler::SendPublicSessionKeyboardLayouts,
+                 weak_factory_.GetWeakPtr(),
+                 user_id),
+      locale);
+}
+
+void SigninScreenHandler::SendPublicSessionKeyboardLayouts(
+    const std::string& user_id,
+    scoped_ptr<base::ListValue> keyboard_layouts) {
   web_ui()->CallJavascriptFunction(
       "login.AccountPickerScreen.setPublicSessionKeyboardLayouts",
       base::StringValue(user_id),
-      *GetKeyboardLayoutsForLocale(locale).release());
+      *keyboard_layouts);
 }
 
 void SigninScreenHandler::HandleLaunchKioskApp(const std::string& app_id,
                                                bool diagnostic_mode) {
   UserContext context(user_manager::USER_TYPE_KIOSK_APP, app_id);
   SigninSpecifics specifics;
   specifics.kiosk_diagnostic_mode = diagnostic_mode;
   if (delegate_)
     delegate_->Login(context, specifics);
 }
@@ skipping 116 matching lines @@
   return gaia_screen_handler_->frame_error();
 }
 
 void SigninScreenHandler::OnCapsLockChanged(bool enabled) {
   caps_lock_enabled_ = enabled;
   if (page_is_ready())
     CallJS("login.AccountPickerScreen.setCapsLockState", caps_lock_enabled_);
 }
 
 }  // namespace chromeos