Use the ICU syntax message for plural formatting

ui/base/l10n/l10n_util.h

 // 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.
 
 // This file contains utility functions for dealing with localized
 // content.
 
 #ifndef UI_BASE_L10N_L10N_UTIL_H_
 #define UI_BASE_L10N_L10N_UTIL_H_
 
@@ skipping 144 matching lines @@
                                               size_t* offset);
 UI_BASE_EXPORT base::string16 GetStringFUTF16(int message_id,
                                               const base::string16& a,
                                               const base::string16& b,
                                               std::vector<size_t>* offsets);
 
 // Convenience functions to get a string with a single number as a parameter.
 UI_BASE_EXPORT base::string16 GetStringFUTF16Int(int message_id, int a);
 base::string16 GetStringFUTF16Int(int message_id, int64 a);
 
-// Get a resource string using |number| to decide which of |message_ids| should
-// be used. |message_ids| must be size 6 and in order: default, singular, zero,
-// two, few, many.
-UI_BASE_EXPORT base::string16 GetPluralStringFUTF16(
-    const std::vector<int>& message_ids,
-    int number);
-UI_BASE_EXPORT std::string GetPluralStringFUTF8(
-    const std::vector<int>& message_ids,
-    int number);
+// Get a resource string using |number| with a locale-specific plural rule.
+// |message_id| points to a message in the ICU syntax.
+// See http://userguide.icu-project.org/formatparse/messages and
+// go/plurals (Google internal).
+UI_BASE_EXPORT base::string16 GetPluralStringFUTF16(int message_id, int number);
+UI_BASE_EXPORT std::string GetPluralStringFUTF8(int message_id, int number);
 
 // In place sorting of base::string16 strings using collation rules for
 // |locale|.
 UI_BASE_EXPORT void SortStrings16(const std::string& locale,
                                   std::vector<base::string16>* strings);
 
 // Returns a vector of available locale codes. E.g., a vector containing
 // en-US, es, fr, fi, pt-PT, pt-BR, etc.
 UI_BASE_EXPORT const std::vector<std::string>& GetAvailableLocales();
 
 // Returns a vector of locale codes usable for accept-languages.
 UI_BASE_EXPORT void GetAcceptLanguagesForLocale(
     const std::string& display_locale,
     std::vector<std::string>* locale_codes);
 
 // Returns the preferred size of the contents view of a window based on
 // designer given constraints which might dependent on the language used.
 UI_BASE_EXPORT int GetLocalizedContentsWidthInPixels(int pixel_resource_id);
 
 UI_BASE_EXPORT const char* const* GetAcceptLanguageListForTesting();
 
 UI_BASE_EXPORT size_t GetAcceptLanguageListSizeForTesting();
 
 }  // namespace l10n_util
 
 #endif  // UI_BASE_L10N_L10N_UTIL_H_