[cros] Fix regression making impossible to select grey G+ avatar.

chrome/browser/chromeos/login/user_manager_impl.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_manager_impl.h"
 
 #include <vector>
 
 #include "ash/desktop_background/desktop_background_controller.h"
 #include "ash/shell.h"
@@ skipping 553 matching lines @@
   if (!downloaded_profile_image_.empty()) {
     // Profile image has already been downloaded, so save it to file right now.
     DCHECK(profile_image_url_.is_valid());
     SaveUserImageInternal(
         username,
         User::kProfileImageIndex, profile_image_url_,
         UserImage::CreateAndEncode(downloaded_profile_image_));
   } else {
     // No profile image - use the stub image (gray avatar).
     SetUserImage(username, User::kProfileImageIndex,
-                 GURL(), UserImage(SkBitmap()));
+                 GURL(), UserImage::CreateAndEncode(SkBitmap()));
     SaveImageToLocalState(username, "", User::kProfileImageIndex,
                           GURL(), false);
   }
 }
 
 void UserManagerImpl::DownloadProfileImage(const std::string& reason) {
   DownloadProfileData(reason, true);
 }
 
 void UserManagerImpl::Observe(int type,
@@ skipping 787 matching lines @@
     BrowserThread::PostTask(
         BrowserThread::FILE,
         FROM_HERE,
         base::Bind(&UserManagerImpl::DeleteUserImage,
                    base::Unretained(this),
                    image_path));
   }
 }
 
 }  // namespace chromeos