Revert 181898

Revert 181898

apparently not at fault

> 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
> Review URL: https://codereview.chromium.org/12210136

TBR=jochen@chromium.org
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=181905