Don't switch browser locale on secondary user login

chrome/browser/chromeos/login/login_utils.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/login_utils.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/chromeos/chromeos_version.h"
@@ skipping 360 matching lines @@
     // Make sure that the google service username is properly set (we do this
     // on every sign in, not just the first login, to deal with existing
     // profiles that might not have it set yet).
     StringPrefMember google_services_username;
     google_services_username.Init(prefs::kGoogleServicesUsername,
                                   user_profile->GetPrefs());
     const User* user = UserManager::Get()->FindUser(email);
     google_services_username.SetValue(user ? user->display_email() : email);
   }
 
-  RespectLocalePreference(user_profile);
+  // For multi-profile case don't apply profile local because it is not safe.
+  if (UserManager::Get()->GetLoggedInUsers().size() == 1)
+    RespectLocalePreference(user_profile);
 }
 
 void LoginUtilsImpl::InitSessionRestoreStrategy() {
   CommandLine* command_line = CommandLine::ForCurrentProcess();
   bool in_app_mode = chrome::IsRunningInForcedAppMode();
 
   // Are we in kiosk app mode?
   if (in_app_mode) {
     if (command_line->HasSwitch(::switches::kAppModeOAuth2Token)) {
       oauth2_refresh_token_ = command_line->GetSwitchValueASCII(
@@ skipping 412 matching lines @@
 bool LoginUtils::IsWhitelisted(const std::string& username) {
   CrosSettings* cros_settings = CrosSettings::Get();
   bool allow_new_user = false;
   cros_settings->GetBoolean(kAccountsPrefAllowNewUser, &allow_new_user);
   if (allow_new_user)
     return true;
   return cros_settings->FindEmailInList(kAccountsPrefUsers, username);
 }
 
 }  // namespace chromeos