Revert of Use new people.get api instead of oauth2/v1/userinfo.

Revert of Use new people.get api instead of oauth2/v1/userinfo. (https://codereview.chromium.org/257773002/)

Reason for revert:
[Sheriff]Speculative revert for breaking CrOS:
http://build.chromium.org/p/chromium.chromiumos/builders/Linux%20ChromiumOS%20Tests%20%282%29/builds/23489

Will reland if it doesn't help.

Original issue's description:
> Use new people.get api instead of oauth2/v1/userinfo.
> Consolidate all uses into main helper class.
> 
> Details about new api: https://developers.google.com/+/api/latest/people/get
> 
> Format of returned response: https://developers.google.com/+/api/latest/people#resource
> 
> BUG=320354
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=267068

TBR=atwilson@chromium.org,noms@chromium.org,guohui@chromium.org,gene@chromium.org,rogerta@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=320354
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=267114

[Michael Achenbach, 2014-04-30 07:16:09]

Created Revert of Use new people.get api instead of oauth2/v1/userinfo.

[commit-bot: I haz the power, 2014-04-30 07:17:07]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/machenbach@chromium.org/265563002/1

[commit-bot: I haz the power, 2014-04-30 07:18:23]

Change committed as 267114