Do not reset LM user image on first signin

chrome/browser/chromeos/login/user_image_manager_impl.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/login/user_image_manager_impl.h"
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
@@ skipping 249 matching lines @@
         NOTREACHED();
       }
     }
   }
 }
 
 void UserImageManagerImpl::UserLoggedIn(const std::string& email,
                                         bool user_is_new,
                                         bool user_is_local) {
   if (user_is_new) {
-    SetInitialUserImage(email);
+    if (!user_is_local)
+      SetInitialUserImage(email);
   } else {
     User* user = UserManager::Get()->GetLoggedInUser();
 
     if (!user_is_local) {
       // If current user image is profile image, it needs to be refreshed.
       bool download_profile_image =
           user->image_index() == User::kProfileImageIndex;
       if (download_profile_image)
         InitDownloadedProfileImage();
 
@@ skipping 492 matching lines @@
   if (prefs_images_update->GetDictionaryWithoutPathExpansion(
           username, &image_properties)) {
     std::string image_path;
     image_properties->GetString(kImagePathNodeName, &image_path);
     prefs_images_update->RemoveWithoutPathExpansion(username, NULL);
     DeleteImageFile(image_path);
   }
 }
 
 }  // namespace chromeos