If user profile doesn't contain language setting, default to his Google account settings.

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 626 matching lines @@
   DCHECK_EQ(downloader, profile_image_downloader.get());
 
   UserManager* user_manager = UserManager::Get();
   const User* user = user_manager->GetLoggedInUser();
 
   if (!downloader->GetProfileFullName().empty()) {
     user_manager->SaveUserDisplayName(
         user->email(), downloader->GetProfileFullName());
   }
 
+  ProfileManager::GetDefaultProfile()->
+      SetGPlusProfileLocale(downloader->GetProfileLocale());

[Nikita (slow), 2013/08/26 09:26:13]

nit: SetGPlusProfileLocale - this method needs to be renamed. This should be
called just AccountLocale (as in Google Account). We may later expand this API.

[Alexander Alekseev, 2013/09/06 19:52:08]

Done.

+
   bool requested_image = downloading_profile_image_;
   downloading_profile_image_ = false;
   if (!requested_image)
     return;
 
   ProfileDownloadResult result = kDownloadFailure;
   switch (downloader->GetProfilePictureStatus()) {
     case ProfileDownloader::PICTURE_SUCCESS:
       result = kDownloadSuccess;
       break;
@@ skipping 59 matching lines @@
   profile_image_downloader_.reset();
 
   UMA_HISTOGRAM_ENUMERATION("UserImage.ProfileDownloadResult",
       kDownloadFailure, kDownloadResultsCount);
 
   DCHECK(!profile_image_load_start_time_.is_null());
   base::TimeDelta delta = base::Time::Now() - profile_image_load_start_time_;
   AddProfileImageTimeHistogram(kDownloadFailure, profile_image_download_reason_,
                                delta);
 
+  ProfileManager::GetDefaultProfile()->
+      SetGPlusProfileLocale(downloader->GetProfileLocale());

[Nikita (slow), 2013/08/26 09:26:13]

Should this really be called in failure case?

[Alexander Alekseev, 2013/09/06 19:52:08]

Yes. I've commented it in the new patch set.

+
   // Retry download after some time if a network error has occured.
   if (reason == ProfileDownloaderDelegate::NETWORK_ERROR) {
     BrowserThread::PostDelayedTask(
         BrowserThread::UI,
         FROM_HERE,
         base::Bind(&UserImageManagerImpl::DownloadProfileDataRetry,
                    base::Unretained(this),
                    downloading_profile_image_),
         base::TimeDelta::FromSeconds(kProfileDataDownloadRetryIntervalSec));
   }
@@ skipping 38 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