Revert of Remove WallpaperManager dependency on Cryptohome.

chrome/browser/chromeos/extensions/wallpaper_private_api.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/chromeos/extensions/wallpaper_private_api.h"
 
 #include <map>
 #include <memory>
 #include <set>
 #include <string>
@@ skipping 603 matching lines @@
 
 bool WallpaperPrivateSetCustomWallpaperFunction::RunAsync() {
   params = set_custom_wallpaper::Params::Create(*args_);
   EXTENSION_FUNCTION_VALIDATE(params);
 
   // Gets account id from the caller, ensuring multiprofile compatibility.
   const user_manager::User* user = GetUserFromBrowserContext(browser_context());
   account_id_ = user->GetAccountId();
   chromeos::WallpaperManager* wallpaper_manager =
       chromeos::WallpaperManager::Get();
-  wallpaper_files_id_ = wallpaper_manager->GetFilesId(account_id_);
+  wallpaper_files_id_ = wallpaper_manager->GetFilesId(*user);
 
   StartDecode(params->wallpaper);
 
   return true;
 }
 
 void WallpaperPrivateSetCustomWallpaperFunction::OnWallpaperDecoded(
     const gfx::ImageSkia& image) {
   chromeos::WallpaperManager* wallpaper_manager =
       chromeos::WallpaperManager::Get();
@@ skipping 325 matching lines @@
 bool WallpaperPrivateRecordWallpaperUMAFunction::RunSync() {
   scoped_ptr<record_wallpaper_uma::Params> params(
       record_wallpaper_uma::Params::Create(*args_));
   EXTENSION_FUNCTION_VALIDATE(params);
 
   user_manager::User::WallpaperType source = getWallpaperType(params->source);
   UMA_HISTOGRAM_ENUMERATION("Ash.Wallpaper.Source", source,
                             user_manager::User::WALLPAPER_TYPE_COUNT);
   return true;
 }