Revert 181812

Revert 181812

Speculative revert to see whether this broke browser_tests on Win Aura Tests(2)

A DCHECK() about invalid strings is hit

> Add a set passphrase dialog which allows to set a passphrase for a managed user account. In a later changelist this will be used for authentication in order to change settings of the account.
> This changelist is extracted from the changelist here: https://codereview.chromium.org/11783008/ in order to break it up.
> A screenshot of the set passphrase page is available here:
> https://docs.google.com/a/google.com/drawings/d/1qXtLoSN2C8Z_qrnNB8yHlJHG96NqL79ciMGaW3amWkw/edit?usp=sharing
> 
> BUG=171370
> TEST=browser_tests, unit_tests
> 
> Review URL: https://chromiumcodereview.appspot.com/12208068

TBR=akuegel@chromium.org
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=181898

[Adrian Kuegel, 2013-02-12 10:02:06]

lgtm