Fix i18n number formats in tray power displays

base/i18n/time_formatting.h

Index: base/i18n/time_formatting.h
diff --git a/base/i18n/time_formatting.h b/base/i18n/time_formatting.h
index df91f41beddd215764f5d0e054a0b8bab777d5bd..8d4ffe59809d5b8f67f219023554bde234d72e3d 100644
--- a/base/i18n/time_formatting.h
+++ b/base/i18n/time_formatting.h
@@ -14,6 +14,7 @@
 namespace base {
 
 class Time;
+class TimeDelta;
 
 // Argument type used to specify the hour clock type.
 enum HourClockType {
@@ -27,6 +28,15 @@ enum AmPmClockType {
   kKeepAmPm,  // Keeps AM/PM sign. e.g., "3:07 PM"
 };
 
+// Should match UMeasureFormatWidth in measfmt.h; replicated here to avoid
+// requiring third_party/icu dependencies with this file.
+enum DurationFormatWidth {
+  DURATION_WIDTH_WIDE,
+  DURATION_WIDTH_SHORT,
+  DURATION_WIDTH_NARROW,
+  DURATION_WIDTH_NUMERIC
+};
+
 // Returns the time of day, e.g., "3:07 PM".
 BASE_I18N_EXPORT string16 TimeFormatTimeOfDay(const Time& time);
 
@@ -65,6 +75,11 @@ BASE_I18N_EXPORT string16 TimeFormatFriendlyDateAndTime(const Time& time);
 // "Monday, March 6, 2008".
 BASE_I18N_EXPORT string16 TimeFormatFriendlyDate(const Time& time);
 
+// Formats a time duration in a numeric format similar to an hour clock, e.g.
+// "3:07".

[jungshik at Google, 2016/05/11 21:11:45]

I guess it has to be made clear that it only supports 'hour and minutes'.  And,
it also supports widths other than numeric.

[Greg Levin, 2016/05/12 19:31:44]

Done.

+BASE_I18N_EXPORT string16 TimeDurationFormat(const TimeDelta& time,
+                                             const DurationFormatWidth width);
+
 // Gets the hour clock type of the current locale. e.g.
 // k12HourClock (en-US).
 // k24HourClock (en-GB).