Revert of Revert of ChromeOS NetworkScreenHandler should not call CheckAndResolveLocale on UI thread. (patchs…

Revert of Revert of ChromeOS NetworkScreenHandler should not call CheckAndResolveLocale on UI thread. (patchs… (patchset #1 id:1 of https://codereview.chromium.org/653123002/)

Reason for revert:
The speculative revert didn't help.

Original issue's description:
> Revert of ChromeOS NetworkScreenHandler should not call CheckAndResolveLocale on UI thread. (patchset #17 id:320001 of https://codereview.chromium.org/620563002/)
>
> Reason for revert:
> Speculatively reverting for https://crbug.com/422703
>
> Original issue's description:
> > ChromeOS NetworkScreenHandler should not call CheckAndResolveLocale on UI thread.
> >
> > BUG=419030
> >
> > Committed: https://crrev.com/d52dffddbf0abe5ca55509a9cdedcd9b0674bb1c
> > Cr-Commit-Position: refs/heads/master@{#298860}
>
> TBR=dzhioev@chromium.org,nkostylev@chromium.org
> NOTREECHECKS=true
> NOTRY=true
> BUG=422703
>
> Committed: https://crrev.com/f09329c436f4929c1f9ffd59e49aa4aef441338b
> Cr-Commit-Position: refs/heads/master@{#299480}

TBR=dzhioev@chromium.org,nkostylev@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=422703
Committed: https://crrev.com/f4af00363b57344b5d024791b751d966a34b0eb8
Cr-Commit-Position: refs/heads/master@{#299883}

[Alexander Alekseev, 2014-10-16 13:05:28]

Created Revert of Revert of ChromeOS NetworkScreenHandler should not call
CheckAndResolveLocale on UI thread. (patchs…

[Alexander Alekseev, 2014-10-17 00:11:17]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/664503003/ by alemate@chromium.org.

The reason for reverting is: Speculatively reverting (second time) for
https://crbug.com/422703 ..