New function IsRunningOnIOS8OrLater

New function IsRunningOnIOS8OrLater

Similar to IsRunningOnIOS7OrLater except that it checks for
iOS 8 or later.

BUG=None

Committed: https://crrev.com/2f3869f92c692f636ad1b517467e1a4dd550a31b
Cr-Commit-Position: refs/heads/master@{#296710}

[sdefresne, 2014-09-25 09:57:52]

sdefresne@chromium.org changed reviewers:
+ stuartmorgan@chromium.org

[sdefresne, 2014-09-25 09:58:21]

droger: PTAL
stuartmorgan: OWNERS

[droger, 2014-09-25 10:43:48]

lgtm

[stuartmorgan, 2014-09-25 14:12:59]

LGTM. This should have been added upstream in the first place. (If downstream
was absolutely necessary due to branch issues, it should have been upstreamed
immediately.)

[sdefresne, 2014-09-25 14:30:03]

The CQ bit was checked by sdefresne@chromium.org

[commit-bot: I haz the power, 2014-09-25 14:31:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/604763002/1

[commit-bot: I haz the power, 2014-09-25 15:31:41]

Committed patchset #1 (id:1) as b0aa9f06f68dfcd17d419fb1d53ff3a9d26f05c0

[commit-bot: I haz the power, 2014-09-25 15:32:36]

Patchset 1 (id:??) landed as
https://crrev.com/2f3869f92c692f636ad1b517467e1a4dd550a31b
Cr-Commit-Position: refs/heads/master@{#296710}