Temporary whitelist several cases of disk I/O on the UI threads in cros.

chrome/browser/chromeos/login/language_switch_menu.cc

 // Copyright (c) 2010 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/language_switch_menu.h"
 
 #include "base/i18n/rtl.h"
+#include "base/threading/thread_restrictions.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/cros/cros_library.h"
 #include "chrome/browser/chromeos/cros/keyboard_library.h"
 #include "chrome/browser/chromeos/input_method/input_method_util.h"
 #include "chrome/browser/chromeos/language_preferences.h"
 #include "chrome/browser/chromeos/login/screen_observer.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/common/pref_names.h"
 #include "grit/generated_resources.h"
@@ skipping 66 matching lines @@
   }
   // Save new locale.
   PrefService* prefs = g_browser_process->local_state();
   // TODO(markusheintz): If the preference is managed and can not be changed by
   // the user, changing the language should be disabled in the UI.
   // TODO(markusheintz): Change the if condition to prefs->IsUserModifiable()
   // once Mattias landed his pending patch.
   if (!prefs->IsManagedPreference(prefs::kApplicationLocale)) {
     prefs->SetString(prefs::kApplicationLocale, locale);
     prefs->SavePersistentPrefs();
-
-    // Switch the locale.
-    const std::string loaded_locale =
-        ResourceBundle::ReloadSharedInstance(locale);
+    std::string loaded_locale;
+    {
+      // Reloading resource bundle causes us to do blocking IO on UI thread.
+      // Temporarily allow it until we fix http://crosbug.com/11102
+      base::ThreadRestrictions::ScopedAllowIO allow_io;
+      // Switch the locale.
+      loaded_locale = ResourceBundle::ReloadSharedInstance(locale);
+    }
     CHECK(!loaded_locale.empty()) << "Locale could not be found for " << locale;
 
     // Enable the keyboard layouts that are necessary for the new locale.
     input_method::EnableInputMethods(
         locale, input_method::kKeyboardLayoutsOnly,
         CrosLibrary::Get()->GetKeyboardLibrary()->
             GetHardwareKeyboardLayoutName());
 
     // The following line does not seem to affect locale anyhow. Maybe in
     // future..
@@ skipping 39 matching lines @@
 void LanguageSwitchMenu::ExecuteCommand(int command_id) {
   const std::string locale = language_list_->GetLocaleFromIndex(command_id);
   SwitchLanguage(locale);
   InitLanguageMenu();
 
   // Update all view hierarchies that the locale has changed.
   views::Widget::NotifyLocaleChanged();
 }
 
 }  // namespace chromeos