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

Revert of Revert of Revert of ChromeOS NetworkScreenHandler should not call CheckAndResolveLocale on UI thread. (patchs… (patchset #1 id:1 of https://codereview.chromium.org/658903004/)

Reason for revert:
Speculatively reverting (second time) for https://crbug.com/422703 .

Original issue's description:
> 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}

TBR=dzhioev@chromium.org,nkostylev@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=422703
Committed: https://crrev.com/ce5453a1ad6449762fce8008506651becdb21f75
Cr-Commit-Position: refs/heads/master@{#300022}

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

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