UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3050.0 Safari/537.36

Steps to reproduce the problem:
1. Compile the following code:
  base::Time time_test;
  base::Time::FromString("24/03/17 07:30:00 pm GMT+5:30", &time_test);
  LOG(INFO) << base::TimeFormatShortDateAndTimeWithTimeZone(time_test);
  base::Time::FromString("24/03/17 07:30:00 pm GMT+5:00", &time_test);
  LOG(INFO) << base::TimeFormatShortDateAndTimeWithTimeZone(time_test);
  base::Time::FromString("24/03/17 07:30:00 pm +0530", &time_test);
  LOG(INFO) << base::TimeFormatShortDateAndTimeWithTimeZone(time_test);

What is the expected behavior?
Logs should be:

24/03/2017, 14:00:00 GMT
24/03/2017, 14:30:00 GMT
24/03/2017, 14:00:00 GMT

What went wrong?
Logs are being shown as:

24/03/2017, 14:30:00 GMT
24/03/2017, 14:30:00 GMT
24/03/2017, 14:00:00 GMT

Did this work before? No 

Chrome version: 59.0.3050.0  Channel: dev
OS Version: OS X 10.12.3
Flash Version: 

I have posted about it on chromium-dev (https://groups.google.com/a/chromium.org/forum/#!topic/chromium-dev/kXmwHeTP3RI).

One of the replies on the thread above mentioned that "GMT+5:30" shouldn't work because it is not standardised. However, if that's the case, "GMT+5:00" shouldn't work either.

I can provide a fix for that code to be reviewed, but I would like to be first directed on what solution would be better: to either remover the this non-standardised evaluation, or to properly carry it out.

Cheers