Implement user selected wallpaper feature.

chrome/browser/chromeos/login/user_manager.h

Index: chrome/browser/chromeos/login/user_manager.h
diff --git a/chrome/browser/chromeos/login/user_manager.h b/chrome/browser/chromeos/login/user_manager.h
index 7e9f6d14191b5d700201d6873edb05ff990a41e4..06b489e7102726a737d45af9fd9f6924314432bb 100644
--- a/chrome/browser/chromeos/login/user_manager.h
+++ b/chrome/browser/chromeos/login/user_manager.h
@@ -175,11 +175,22 @@ class UserManager {
   virtual void SaveUserImage(const std::string& username,
                              const SkBitmap& image) = 0;
 
+  // Update custom wallpaper to selected layout and saves layout to Local
+  // State.
+  virtual void SetLoggedInUserCustomWallpaperLayout(
+      ash::WallpaperLayout layout) = 0;
+
   // Tries to load user image from disk; if successful, sets it for the user,
   // sends LOGIN_USER_IMAGE_CHANGED notification and updates Local State.
   virtual void SaveUserImageFromFile(const std::string& username,
                                      const FilePath& path) = 0;
 
+  // Tries to load user image from disk; if successful, sets it for the user,
+  // and updates Local State.
+  virtual void SaveUserWallpaperFromFile(const std::string& username,
+                                         const FilePath& path,
+                                         ash::WallpaperLayout layout) = 0;
+
   // Sets profile image as user image for |username|, sends
   // LOGIN_USER_IMAGE_CHANGED notification and updates Local State. If the user
   // is not logged-in or the last |DownloadProfileImage| call has failed, a