base: Add base::TimeTicks::IsHighResNowFastAndReliable

base: Add base::TimeTicks::IsHighResNowFastAndReliable

This will allow clients determine if it's okay to call
HighResNow often and rely on its results. If it is not
reliable, the client can use a fallback path that is
better than relying on a bad HighResNow.

BUG=305645
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=228798

[brianderson, 2013-10-15 10:48:52]

ptal

[jar (doing other things), 2013-10-15 17:47:16]

I'm fine with this change, but please do not land until James concurs.

LGTM for base in patch set 2.

[brianderson, 2013-10-15 18:53:22]

Hmm, it looks like James is on vacation until 10/21.  This patch is blocking a
lot of other work though. Is there anyone else who could give this a second
look?

[jar (doing other things), 2013-10-15 19:08:29]

On 2013/10/15 18:53:22, Brian Anderson wrote:
> Hmm, it looks like James is on vacation until 10/21.  This patch is blocking a
> lot of other work though. Is there anyone else who could give this a second
> look?

OK.  I'm fine with a LGTM.

Land when you'd like ;-).

[commit-bot: I haz the power, 2013-10-15 19:13:51]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/brianderson@chromium.org/27317002/7001

[commit-bot: I haz the power, 2013-10-15 23:16:10]

Change committed as 228798