Add month and year to time_format.

Add month and year to time_format.

Add the possibility to have month and years in time format.
A year is defined as 365 days.
A month is defined as 1year / 12.

'1 month' means more than one month and less than two month (same for
years).

BUG=694451

[Olivier, 2017-04-05 09:12:19]

olivierrobin@chromium.org changed reviewers:
+ gambard@chromium.org, jshin@chromium.org

[Olivier, 2017-04-05 09:12:20]

gambard for RL, jshin for time_format.

Some choices (rounding, definitions of month) may be changed.
If you have better options, please tell me.

[gambard, 2017-04-05 09:17:14]

reading list lgtm

[Olivier, 2017-04-10 08:32:15]

Friendly ping

[jungshik at Google, 2017-04-11 18:10:44]

On 2017/04/10 08:32:15, Olivier Robin wrote:
> Friendly ping

Sorry. I'm looking.

[jungshik at Google, 2017-04-11 19:01:32]

LGTM with nits taken care of.

https://codereview.chromium.org/2803593002/diff/1/ui/base/l10n/time_format.h
File ui/base/l10n/time_format.h (right):

https://codereview.chromium.org/2803593002/diff/1/ui/base/l10n/time_format.h#...
ui/base/l10n/time_format.h:77: // twelfth of the year. Due to the lenght of
these time, and the approximative

nit: approximate (not approximative) 
not: lenght => length

https://codereview.chromium.org/2803593002/diff/1/ui/strings/ui_strings.grd
File ui/strings/ui_strings.grd (right):

https://codereview.chromium.org/2803593002/diff/1/ui/strings/ui_strings.grd#n...
ui/strings/ui_strings.grd:212: {MONTGS, plural, =1 {1 month} other {# months}}
nit: MONTHS instead of MONTGS

[gambard, 2017-04-28 09:09:42]

Closing this as https://codereview.chromium.org/2845693002/ landed