This CL replaces e-mail with AccountId in wallpaper manager code.

chrome/browser/chromeos/login/app_launch_signin_screen.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/chromeos/login/app_launch_signin_screen.h"
 
 #include "base/values.h"
 #include "chrome/browser/chromeos/login/help_app_launcher.h"
 #include "chrome/browser/chromeos/login/screens/user_selection_screen.h"
 #include "chrome/browser/chromeos/login/session/user_session_manager.h"
@@ skipping 79 matching lines @@
       content::BrowserThread::UI, FROM_HERE,
       base::Bind(&Authenticator::AuthenticateToUnlock,
                  authenticator_.get(),
                  user_context));
 }
 
 void AppLaunchSigninScreen::MigrateUserData(const std::string& old_password) {
   NOTREACHED();
 }
 
-void AppLaunchSigninScreen::LoadWallpaper(const std::string& username) {
-}
+void AppLaunchSigninScreen::LoadWallpaper(const AccountId& account_id) {}
 
 void AppLaunchSigninScreen::LoadSigninWallpaper() {
 }
 
 void AppLaunchSigninScreen::OnSigninScreenReady() {
 }
 
 void AppLaunchSigninScreen::RemoveUser(const AccountId& account_id) {
   NOTREACHED();
 }
@@ skipping 103 matching lines @@
 }
 
 void AppLaunchSigninScreen::CheckUserStatus(const AccountId& account_id) {}
 
 bool AppLaunchSigninScreen::IsUserWhitelisted(const std::string& user_id) {
   NOTREACHED();
   return true;
 }
 
 }  // namespace chromeos