Implement user selected wallpaper feature.

chrome/browser/chromeos/login/mock_user_manager.h

Index: chrome/browser/chromeos/login/mock_user_manager.h
diff --git a/chrome/browser/chromeos/login/mock_user_manager.h b/chrome/browser/chromeos/login/mock_user_manager.h
index 65ccc46a51d252498d19e898ac6f5826dc7a8fc6..859c8805e67ec9debff22223639ab5614583e340 100644
--- a/chrome/browser/chromeos/login/mock_user_manager.h
+++ b/chrome/browser/chromeos/login/mock_user_manager.h
@@ -42,8 +42,13 @@ class MockUserManager : public UserManager {
   MOCK_CONST_METHOD1(GetUserDisplayEmail, std::string(const std::string&));
   MOCK_METHOD2(SaveUserDefaultImageIndex, void(const std::string&, int));
   MOCK_METHOD2(SaveUserImage, void(const std::string&, const SkBitmap&));
+  MOCK_METHOD1(SetLoggedInUserCustomWallpaperLayout,void(
+      ash::WallpaperLayout));
   MOCK_METHOD2(SaveUserImageFromFile, void(const std::string&,
                                            const FilePath&));
+  MOCK_METHOD3(SaveUserWallpaperFromFile, void(const std::string&,
+                                               const FilePath&,
+                                               ash::WallpaperLayout));
   MOCK_METHOD1(SaveUserImageFromProfileImage, void(const std::string&));
   MOCK_METHOD1(DownloadProfileImage, void(const std::string&));
   MOCK_METHOD0(LoadKeyStore, void(void));