[MD History] Fix toolbar dates in grouped mode.

base/i18n/time_formatting.cc

 // 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.
 
 #include "base/i18n/time_formatting.h"
 
 #include <stddef.h>
 
 #include <memory>
 
@@ skipping 123 matching lines @@
   return TimeFormat(formatter.get(), time);
 }
 
 string16 TimeFormatShortDateAndTimeWithTimeZone(const Time& time) {
   std::unique_ptr<icu::DateFormat> formatter(
       icu::DateFormat::createDateTimeInstance(icu::DateFormat::kShort,
                                               icu::DateFormat::kLong));
   return TimeFormat(formatter.get(), time);
 }
 
+string16 TimeFormatMonthAndYear(const Time& time) {
+  icu::SimpleDateFormat formatter = CreateSimpleDateFormatter(UDAT_YEAR_MONTH);
+  return TimeFormat(&formatter, time);
+}
+
+string16 TimeFormatWeekdayMonthAndDay(const Time& time) {
+  icu::SimpleDateFormat formatter =
+      CreateSimpleDateFormatter(UDAT_MONTH_WEEKDAY_DAY);
+  return TimeFormat(&formatter, time);
+}
+
 string16 TimeFormatFriendlyDateAndTime(const Time& time) {
   std::unique_ptr<icu::DateFormat> formatter(
       icu::DateFormat::createDateTimeInstance(icu::DateFormat::kFull));
   return TimeFormat(formatter.get(), time);
 }
 
 string16 TimeFormatFriendlyDate(const Time& time) {
   std::unique_ptr<icu::DateFormat> formatter(
       icu::DateFormat::createDateInstance(icu::DateFormat::kFull));
   return TimeFormat(formatter.get(), time);
@@ skipping 51 matching lines @@
   // See http://userguide.icu-project.org/formatparse/datetime for details
   // about the date/time format syntax.
   if (pattern_unicode.indexOf('a') == -1) {
     return k24HourClock;
   } else {
     return k12HourClock;
   }
 }
 
 }  // namespace base