Default to current UI locale when recommended locales are invalid

chrome/browser/ui/webui/chromeos/login/l10n_util.cc

 // Copyright 2014 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/ui/webui/chromeos/login/l10n_util.h"
 
 #include <algorithm>
 #include <iterator>
 #include <map>
 #include <set>
@@ skipping 352 matching lines @@
     }
 
     language_info->SetString("value", value);
     language_info->SetString("title", display_name);
     if (value == selected)
       language_info->SetBoolean("selected", true);
   }
   return languages_list.Pass();
 }
 
+std::string FindMostRelevantLocale(
+    const std::vector<std::string>* most_relevant_language_codes,
+    const base::ListValue& available_locales,
+    const std::string& fallback_locale) {
+  if (!most_relevant_language_codes)
+    return fallback_locale;
+
+  for (std::vector<std::string>::const_iterator most_relevant_it =
+          most_relevant_language_codes->begin();
+       most_relevant_it != most_relevant_language_codes->end();
+       ++most_relevant_it) {
+    base::StringValue most_relevant_locale(*most_relevant_it);
+    for (base::ListValue::const_iterator available_it =
+             available_locales.begin();
+         available_it != available_locales.end(); ++available_it) {
+      if (most_relevant_locale.Equals(*available_it))
+        return *most_relevant_it;
+    }
+  }
+
+  return fallback_locale;
+}
+
 scoped_ptr<base::ListValue> GetAcceptLanguageList() {
   // Collect the language codes from the supported accept-languages.
   const std::string app_locale = g_browser_process->GetApplicationLocale();
   std::vector<std::string> accept_language_codes;
   l10n_util::GetAcceptLanguagesForLocale(app_locale, &accept_language_codes);
   return GetLanguageList(
       *input_method::InputMethodManager::Get()->GetSupportedInputMethods(),
       accept_language_codes,
       StartupCustomizationDocument::GetInstance()->configured_locales(),
       false);
@@ skipping 88 matching lines @@
 scoped_ptr<base::DictionaryValue> GetCurrentKeyboardLayout() {
   const input_method::InputMethodDescriptor current_input_method =
       input_method::InputMethodManager::Get()
           ->GetActiveIMEState()
           ->GetCurrentInputMethod();
   return CreateInputMethodsEntry(current_input_method,
                                  current_input_method.id());
 }
 
 }  // namespace chromeos