Revert of GetUILanguageList should correctly handle locale aliases.

Revert of GetUILanguageList should correctly handle locale aliases. (patchset #2 id:20001 of https://codereview.chromium.org/608903003/)

Reason for revert:
22366:22366:0929/155200:FATAL:thread_restrictions.cc(38)] Function marked as IO-only was called from a thread that disallows IO!  If this thread really should be allowed to make IO calls, adjust the call to base::ThreadRestrictions::SetIOAllowed() in this thread's startup.
#0 0x7fffeb18b02e base::debug::StackTrace::StackTrace()
#1 0x7fffeb216e02 logging::LogMessage::~LogMessage()
#2 0x7fffeb309b9f base::ThreadRestrictions::AssertIOAllowed()
#3 0x7fffeb1fef31 base::PathExists()
#4 0x7fffebbf5837 ui::ResourceBundle::GetLocaleFilePath()
#5 0x7fffebbf5689 ui::ResourceBundle::LocaleDataPakExists()
#6 0x7fffebbc770a (anonymous namespace)::IsLocaleAvailable()
#7 0x7fffebbc723c l10n_util::CheckAndResolveLocale()
#8 0x55555782fe45 chromeos::(anonymous namespace)::GetLanguageList()
#9 0x55555782f0d5 chromeos::GetUILanguageList()
#10 0x55555783d07f chromeos::NetworkScreenHandler::GetAdditionalParameters()
#11 0x55555783d74f chromeos::NetworkScreenHandler::GetAdditionalParameters()
#12 0x55555780d38d chromeos::BaseScreenHandler::GetLocalizedStrings()
#13 0x555557430d0c chromeos::OobeUI::GetLocalizedStrings()
#14 0x55555743035d chromeos::OobeUI::OobeUI()
#15 0x555557464d13 (anonymous namespace)::NewWebUI<>()
#16 0x55555746318f ChromeWebUIControllerFactory::CreateWebUIControllerForURL()
#17 0x7ffff3bb04c7 content::WebUIControllerFactoryRegistry::CreateWebUIControllerForURL()
#18 0x7ffff3b58acb content::WebContentsImpl::CreateWebUI()
#19 0x7ffff3b681c2 content::WebContentsImpl::CreateWebUIForRenderManager()
#20 0x7ffff3b681ff content::WebContentsImpl::CreateWebUIForRenderManager()
#21 0x7ffff3517724 content::RenderFrameHostManager::SetPendingWebUI()
#22 0x7ffff35180dc content::RenderFrameHostManager::UpdateStateForNavigate()
#23 0x7ffff3517952 content::RenderFrameHostManager::Navigate()
#24 0x7ffff34f7715 content::NavigatorImpl::NavigateToEntry()
#25 0x7ffff34f7cce content::NavigatorImpl::NavigateToPendingEntry()
#26 0x7ffff3b5ef21 content::WebContentsImpl::NavigateToPendingEntry()
#27 0x7ffff3b5ef52 content::WebContentsImpl::NavigateToPendingEntry()
#28 0x7ffff34dd7b5 content::NavigationControllerImpl::NavigateToPendingEntry()
#29 0x7ffff34ddbda content::NavigationControllerImpl::LoadEntry()
#30 0x7ffff34df6c4 content::NavigationControllerImpl::LoadURLWithParams()
#31 0x7ffff34dee3f content::NavigationControllerImpl::LoadURL()
#32 0x7ffff2b051ee views::WebView::LoadInitialURL()
#33 0x55555813ce7b chromeos::WebUILoginView::LoadURL()
#34 0x555558126f0f chromeos::LoginDisplayHostImpl::LoadURL()
#35 0x555558126b25 chromeos::LoginDisplayHostImpl::StartWizard()
#36 0x5555581292da chromeos::LoginDisplayHostImpl::StartPostponedWebUI()
#37 0x555558128a18 chromeos::LoginDisplayHostImpl::Observe()
#38 0x55555812940d chromeos::LoginDisplayHostImpl::Observe()
#39 0x7ffff37da39b content::NotificationServiceImpl::Notify()
#40 0x555557f3a994 chromeos::(anonymous namespace)::UserWallpaperDelegate::OnWallpaperAnimationFinished()
#41 0x7fffea807a07 ash::RootWindowController::OnWallpaperAnimationFinished()
#42 0x7fffea75802a ash::(anonymous namespace)::ShowWallpaperAnimationObserver::OnImplicitAnimationsCompleted()
#43 0x7fffeae72e40 ui::ImplicitAnimationObserver::CheckCompleted()
#44 0x7fffeae72de5 ui::ImplicitAnimationObserver::SetActive()
#45 0x7fffeae937b5 ui::ScopedLayerAnimationSettings::~ScopedLayerAnimationSettings()
#46 0x7fffea757bb4 ash::DesktopBackgroundWidgetController::StartAnimating()
#47 0x7fffea74e2c6 ash::DesktopBackgroundController::InstallDesktopController()
#48 0x7fffea74e3b3 ash::DesktopBackgroundController::InstallDesktopControllerForAllWindows()
#49 0x7fffea74db8c ash::DesktopBackgroundController::SetDesktopBackgroundImageMode()
#50 0x7fffea74d854 ash::DesktopBackgroundController::SetWallpaperImage()
#51 0x55555816ad4e chromeos::WallpaperManager::DoSetDefaultWallpaper()
#52 0x55555816a26d chromeos::WallpaperManager::PendingWallpaper::ProcessRequest()
#53 0x555558188f12 base::internal::RunnableAdapter<>::Run()
#54 0x555558188e89 base::internal::InvokeHelper<>::MakeItSo()
#55 0x555558188e45 base::internal::Invoker<>::Run()
#56 0x7fffeb17303e base::Callback<>::Run()
#57 0x7fffeb3100d6 base::Timer::RunScheduledTask()
#58 0x7fffeb3101ec base::BaseTimerTaskInternal::Run()
#59 0x7fffeb3104b2 base::internal::RunnableAdapter<>::Run()
#60 0x7fffeb31041c base::internal::InvokeHelper<>::MakeItSo()
#61 0x7fffeb3103c5 base::internal::Invoker<>::Run()

Original issue's description:
> GetUILanguageList should correctly handle locale aliases.
>
> GetUILanguageList didn't check for locale aliases when resolving input
> method languages. This patch fixes it.
>
> BUG=418220
> TEST=manual
>
> Committed: https://crrev.com/b1c6a6e8fc6b4368cf63dfc00e8a4fec691fed1d
> Cr-Commit-Position: refs/heads/master@{#297086}

TBR=dzhioev@chromium.org,alemate@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=418220
Committed: https://crrev.com/38da55efc7c6150f0ff9929297c6da77944679e5
Cr-Commit-Position: refs/heads/master@{#297253}

[Nikita (slow), 2014-09-29 20:48:53]

Created Revert of GetUILanguageList should correctly handle locale aliases.

[commit-bot: I haz the power, 2014-09-29 20:50:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/614773003/1

[commit-bot: I haz the power, 2014-09-29 20:51:26]

Committed patchset #1 (id:1) as 832475a747247144effd8954b05dd2d9f196fe58

[commit-bot: I haz the power, 2014-09-29 20:52:03]

Patchset 1 (id:??) landed as
https://crrev.com/38da55efc7c6150f0ff9929297c6da77944679e5
Cr-Commit-Position: refs/heads/master@{#297253}