Revert 246674 "Indicate which authentication flow was used in Us..."

Revert 246674 "Indicate which authentication flow was used in Us..."

This CL breaks telemetry login. Reverting.

> Indicate which authentication flow was used in UserContext
> 
> This CL adds a field to UserContext that indicates which authentication
> flow was used (online without SAML, online with SAML, offline). This
> distinction will be used to implement a policy that forces SAML users to
> log in via the online authentication flow periodically.
> 
> BUG=332081
> TEST=Manual (automated tests coming in follow-up CL that adds the policy)
> 
> Review URL: https://codereview.chromium.org/145073003

TBR=bartfab@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=246712

[achuithb, 2014-01-23 23:02:12]

Committed patchset #1 manually as r246712.

[achuithb, 2014-01-23 23:04:52]

Dan: Sorry, should've probably talked to you first. This CL breaks telemetry,
and hence the cros bots:
http://chromegw.corp.google.com/i/chromium.chromiumos/builders/ChromiumOS%20%...
http://chromegw.corp.google.com/i/chromium.chromiumos/builders/ChromiumOS%20%...

[Daniel Erat, 2014-01-23 23:06:35]

No problem. I was just staring at these failure -- thanks for reverting it!

[Daniel Erat, 2014-01-23 23:06:44]

lgtm