Revert of Revert of ChromeOS NetworkScreenHandler should not call CheckAndResolveLocale on UI thread. (patchs…

chrome/browser/chromeos/chrome_browser_main_chromeos.cc

Index: chrome/browser/chromeos/chrome_browser_main_chromeos.cc
diff --git a/chrome/browser/chromeos/chrome_browser_main_chromeos.cc b/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
index da1c2b50f824061fe8431b3c1b5a96837cdfd4df..cccdc54f44108248af556d08cdf06280e8cecc12 100644
--- a/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
+++ b/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
@@ -452,9 +452,7 @@
 
   // Must match SwitchLanguageCallback type.
   static void Callback(const scoped_ptr<GuestLanguageSetCallbackData>& self,
-                       const std::string& locale,
-                       const std::string& loaded_locale,
-                       bool success);
+                       const locale_util::LanguageSwitchResult& result);
 
   Profile* profile;
 };
@@ -462,9 +460,7 @@
 // static
 void GuestLanguageSetCallbackData::Callback(
     const scoped_ptr<GuestLanguageSetCallbackData>& self,
-    const std::string& locale,
-    const std::string& loaded_locale,
-    bool success) {
+    const locale_util::LanguageSwitchResult& result) {
   input_method::InputMethodManager* manager =
       input_method::InputMethodManager::Get();
   scoped_refptr<input_method::InputMethodManager::State> ime_state =
@@ -480,7 +476,7 @@
   // Second, enable locale based input methods.
   const std::string locale_default_input_method =
       manager->GetInputMethodUtil()->GetLanguageDefaultInputMethodId(
-          loaded_locale);
+          result.loaded_locale);
   if (!locale_default_input_method.empty()) {
     PrefService* user_prefs = self->profile->GetPrefs();
     user_prefs->SetString(prefs::kLanguagePreviousInputMethod,
@@ -498,13 +494,12 @@
 void SetGuestLocale(Profile* const profile) {
   scoped_ptr<GuestLanguageSetCallbackData> data(
       new GuestLanguageSetCallbackData(profile));
-  scoped_ptr<locale_util::SwitchLanguageCallback> callback(
-      new locale_util::SwitchLanguageCallback(base::Bind(
-          &GuestLanguageSetCallbackData::Callback, base::Passed(data.Pass()))));
+  locale_util::SwitchLanguageCallback callback(base::Bind(
+      &GuestLanguageSetCallbackData::Callback, base::Passed(data.Pass())));
   user_manager::User* const user =
       ProfileHelper::Get()->GetUserByProfile(profile);
   UserSessionManager::GetInstance()->RespectLocalePreference(
-      profile, user, callback.Pass());
+      profile, user, callback);
 }
 
 void ChromeBrowserMainPartsChromeos::PostProfileInit() {