Enable user change background image in settings page in Aura build.

chrome/browser/chromeos/login/user.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/login/user.h"
 
 #include "base/stringprintf.h"
 #include "chrome/browser/chromeos/login/default_user_images.h"
 #include "chrome/browser/chromeos/login/user_manager.h"
 #include "grit/theme_resources.h"
@@ skipping 14 matching lines @@
   }
   return email.substr(0, i);
 }
 
 }  // namespace
 
 User::User(const std::string& email, bool is_guest)
     : email_(email),
       oauth_token_status_(OAUTH_TOKEN_STATUS_UNKNOWN),
       image_index_(kInvalidImageIndex),
+      wallpaper_index_(kDefaultWallpaperIndex),
       image_is_stub_(false),
       is_guest_(is_guest) {
   // The email address of a demo user is for internal purposes only,
   // never meant for display.
   if (email != kDemoUser)
     display_email_ = email;
   image_ = *ResourceBundle::GetSharedInstance().GetBitmapNamed(
       kDefaultImageResources[0]);
 }
 
 User::~User() {}
 
+void User::SetWallpaper(int wallpaper_index) {
+  wallpaper_index_ = wallpaper_index;
+}
+
 void User::SetImage(const SkBitmap& image, int image_index) {
   image_ = image;
   image_index_ = image_index;
   image_is_stub_ = false;
 }
 
 void User::SetStubImage(int image_index) {
   image_ = *ResourceBundle::GetSharedInstance().
       GetBitmapNamed(kStubImageResourceID);
   image_index_ = image_index;
@@ skipping 21 matching lines @@
   }
   size_t domain_start = at_pos + 1;
   std::string domain = user_email.substr(domain_start,
                                          user_email.length() - domain_start);
   return base::StringPrintf("%s (%s)",
                             GetDisplayName().c_str(),
                             domain.c_str());
 }
 
 }  // namespace chromeos