[Autofill] Credit Card Autofill Last Used Date Experiment

base/i18n/time_formatting.h

 // Copyright (c) 2011 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.
 
 // Basic time formatting methods.  These methods use the current locale
 // formatting for displaying the time.
 
 #ifndef BASE_I18N_TIME_FORMATTING_H_
 #define BASE_I18N_TIME_FORMATTING_H_
 
@@ skipping 57 matching lines @@
 TimeFormatShortDateAndTimeWithTimeZone(const Time& time);
 
 // Formats a time in a friendly sentence format, e.g.
 // "Monday, March 6, 2008 2:44:30 PM".
 BASE_I18N_EXPORT string16 TimeFormatFriendlyDateAndTime(const Time& time);
 
 // Formats a time in a friendly sentence format, e.g.
 // "Monday, March 6, 2008".
 BASE_I18N_EXPORT string16 TimeFormatFriendlyDate(const Time& time);
 
+// Formats a time using a skeleton to produce a format for different locales
+// when unusual time format is needed, e.g.
+// "Feb. 2, 18:00".
+//
+// See http://userguide.icu-project.org/formatparse/datetime for details.
+BASE_I18N_EXPORT string16 TimeFormatWithPattern(const Time& time,
+                                                const char* pattern);

[jungshik at Google, 2017/01/23 21:43:24]

Perhaps, add a unit test? 

[jiahuiguo, 2017/01/26 05:46:12]

Done.

+
 // Formats a time duration of hours and minutes into various formats, e.g.,
 // "3:07" or "3 hours, 7 minutes".  See DurationFormatWidth for details.
 //
 // Please don't use width = DURATION_WIDTH_NUMERIC when the time duration
 // can possibly be larger than 24h, as the hour value will be cut below 24
 // after formatting.
 // TODO(chengx): fix function output when width = DURATION_WIDTH_NUMERIC
 // (http://crbug.com/675791)
 BASE_I18N_EXPORT string16 TimeDurationFormat(const TimeDelta time,
                                              const DurationFormatWidth width);
@@ skipping 12 matching lines @@
                               const DurationFormatWidth width);
 
 // Gets the hour clock type of the current locale. e.g.
 // k12HourClock (en-US).
 // k24HourClock (en-GB).
 BASE_I18N_EXPORT HourClockType GetHourClockType();
 
 }  // namespace base
 
 #endif  // BASE_I18N_TIME_FORMATTING_H_