Revert 190448 "Revert 189680 "Fix registry key reading bug""
Turns out this is ok, we want this in m27.
> Revert 189680 "Fix registry key reading bug"
>
> caused major hangs on canary. will reland when there's a fix for crbug.com/181665
>
> > Fix registry key reading bug
> >
> > The current code succeeds even if the keys are not in the machine
> > therefore dCute is detected and the videocard capabilities are
> > downgraded
> >
> > BUG=181665
> > TEST=see bug
> > Review URL: https://codereview.chromium.org/
12534013
>
> TBR=cpu@chromium.org
> Review URL: https://codereview.chromium.org/
12704020
TBR=karen@chromium.org
Review URL: https://codereview.chromium.org/
12906015
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@191079 0039d316-1c4b-4281-b951-d872f2087c98