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

chrome/browser/chromeos/background/ash_user_wallpaper_delegate.cc

 // Copyright (c) 2012 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/background/ash_user_wallpaper_delegate.h"
 
 #include "ash/desktop_background/user_wallpaper_delegate.h"
 #include "ash/shell.h"
 #include "ash/wm/window_animations.h"
 #include "base/command_line.h"
@@ skipping 91 matching lines @@
     if (user_type != LoginState::LOGGED_IN_USER_REGULAR &&
         user_type != LoginState::LOGGED_IN_USER_OWNER &&
         user_type != LoginState::LOGGED_IN_USER_PUBLIC_ACCOUNT &&
         user_type != LoginState::LOGGED_IN_USER_SUPERVISED) {
       return false;
     }
     const user_manager::User* user =
         user_manager::UserManager::Get()->GetActiveUser();
     if (!user)
       return false;
-    if (chromeos::WallpaperManager::Get()->IsPolicyControlled(user->email()))
+    if (chromeos::WallpaperManager::Get()->IsPolicyControlled(
+            user->GetAccountId()))
       return false;
     return true;
   }
 
   void OnWallpaperAnimationFinished() override {
     content::NotificationService::current()->Notify(
         chrome::NOTIFICATION_WALLPAPER_ANIMATION_FINISHED,
         content::NotificationService::AllSources(),
         content::NotificationService::NoDetails());
   }
@@ skipping 12 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(UserWallpaperDelegate);
 };
 
 }  // namespace
 
 ash::UserWallpaperDelegate* CreateUserWallpaperDelegate() {
   return new chromeos::UserWallpaperDelegate();
 }
 
 }  // namespace chromeos