Revert of Enable forced extension updates on NaCl arch mismatch (patchset #5 id:10000...

Revert of Enable forced extension updates on NaCl arch mismatch (patchset #5 id:100001 of https://codereview.chromium.org/516293007/)

Reason for revert:
Chrome OS build with DCHECKs enabled fails on start. This CL breaks assumption, that GAIA extension can be loaded without performing IO-operations.

Log and stack trace:
[16275:16275:0903/161435:WARNING:renderer_freezer.cc(55)] Cgroup freezer does not exist or is not writable. Processes will not be frozen during suspend.
[16275:16275:0903/161435:WARNING:configuration_policy_pref_store.cc(30)] Policy RemoteAccessClientFirewallTraversal: This policy has been deprecated.
[16275:16275:0903/161437: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 0x7fe3122e555e base::debug::StackTrace::StackTrace()
#1 0x7fe31237c462 logging::LogMessage::~LogMessage()
#2 0x7fe3124824af base::ThreadRestrictions::AssertIOAllowed()
#3 0x7fe3123630a1 base::PathExists()
#4 0x7fe321cfd5f3 extensions::(anonymous namespace)::CollectPlatformSpecificResourceArchs()
#5 0x7fe321cfad22 extensions::Extension::InitFromValue()
#6 0x7fe321cfa490 extensions::Extension::Create()
#7 0x7fe321cfa114 extensions::Extension::Create()
#8 0x7fe3233ebe1b extensions::ComponentLoader::Load()
#9 0x7fe3233ec3cf extensions::ComponentLoader::Add()
#10 0x7fe3233ec32a extensions::ComponentLoader::Add()
#11 0x7fe3233ec2b0 extensions::ComponentLoader::Add()
#12 0x7fe32437505f (anonymous namespace)::LoadGaiaAuthExtension()
#13 0x7fe324374d5e extensions::GaiaAuthExtensionLoader::LoadIfNeeded()
#14 0x7fe324237f7e ScopedGaiaAuthExtension::ScopedGaiaAuthExtension()
#15 0x7fe322f68bb2 chromeos::WebUILoginView::Init()
#16 0x7fe322f556ef chromeos::LoginDisplayHostImpl::InitLoginWindowAndView()
#17 0x7fe322f52640 chromeos::LoginDisplayHostImpl::LoadURL()
#18 0x7fe322f5226a chromeos::LoginDisplayHostImpl::StartWizard()
#19 0x7fe322f54acd chromeos::LoginDisplayHostImpl::StartPostponedWebUI()
#20 0x7fe322f541f8 chromeos::LoginDisplayHostImpl::Observe()
#21 0x7fe322f54bfd chromeos::LoginDisplayHostImpl::Observe()
#22 0x7fe31b222377 content::NotificationServiceImpl::Notify()
#23 0x7fe322d51a24 chromeos::(anonymous namespace)::UserWallpaperDelegate::OnWallpaperAnimationFinished()
#24 0x7fe31188692f ash::RootWindowController::OnWallpaperAnimationFinished()
#25 0x7fe3117c633a ash::(anonymous namespace)::ShowWallpaperAnimationObserver::OnImplicitAnimationsCompleted()
#26 0x7fe311f72d30 ui::ImplicitAnimationObserver::CheckCompleted()
#27 0x7fe311f72cd5 ui::ImplicitAnimationObserver::SetActive()
#28 0x7fe311f965d5 ui::ScopedLayerAnimationSettings::~ScopedLayerAnimationSettings()
#29 0x7fe3117c5ec7 ash::DesktopBackgroundWidgetController::StartAnimating()
#30 0x7fe3117bbb0c ash::DesktopBackgroundController::InstallDesktopController()
#31 0x7fe3117bbc03 ash::DesktopBackgroundController::InstallDesktopControllerForAllWindows()
#32 0x7fe3117bb3cc ash::DesktopBackgroundController::SetDesktopBackgroundImageMode()
#33 0x7fe3117bb096 ash::DesktopBackgroundController::SetWallpaperImage()
#34 0x7fe322f9a6b9 chromeos::WallpaperManager::DoSetDefaultWallpaper()
#35 0x7fe322f99b73 chromeos::WallpaperManager::PendingWallpaper::ProcessRequest()
#36 0x7fe322fbac72 base::internal::RunnableAdapter<>::Run()
#37 0x7fe322fbabe9 base::internal::InvokeHelper<>::MakeItSo()
#38 0x7fe322fbaba5 base::internal::Invoker<>::Run()
#39 0x7fe3122cc9ce base::Callback<>::Run()
#40 0x7fe312488f86 base::Timer::RunScheduledTask()
#41 0x7fe3124890bc base::BaseTimerTaskInternal::Run()
#42 0x7fe312489382 base::internal::RunnableAdapter<>::Run()
#43 0x7fe3124892ec base::internal::InvokeHelper<>::MakeItSo()
#44 0x7fe312489295 base::internal::Invoker<>::Run()
#45 0x7fe3122cc9ce base::Callback<>::Run()
#46 0x7fe3122eb9b3 base::debug::TaskAnnotator::RunTask()
#47 0x7fe3123a1c57 base::MessageLoop::RunTask()
#48 0x7fe3123a1d9b base::MessageLoop::DeferOrRunPendingTask()
#49 0x7fe3123a228d base::MessageLoop::DoDelayedWork()
#50 0x7fe3122a1f25 base::MessagePumpGlib::Run()
#51 0x7fe3123a17f0 base::MessageLoop::RunHandler()
#52 0x7fe3124093b2 base::RunLoop::Run()
#53 0x7fe324217e4d ChromeBrowserMainParts::MainMessageLoopRun()
#54 0x7fe31ad2a8bf content::BrowserMainLoop::RunMainMessageLoopParts()
#55 0x7fe31ad344c7 content::BrowserMainRunnerImpl::Run()
#56 0x7fe31ad251b1 content::BrowserMain()
#57 0x7fe31abb997f content::RunNamedProcessTypeMain()
#58 0x7fe31abbcce8 content::ContentMainRunnerImpl::Run()
#59 0x7fe31abb8ee5 content::ContentMain()
#60 0x7fe3206d3505 ChromeMain
#61 0x7fe3206d34b2 main

Cannot upload crash dump: cannot exec /sbin/crash_reporter

Crash_reporter failed to process crash report

Original issue's description:
> Enable forced extension updates on NaCl arch mismatch
>
> This makes extensions aware of the platforms for which
> they have platform-specific resources installed, if any.
>
> This also hooks up the extension update code with some
> additional logic to place an extension in forced-update
> mode if it has platform-specific resources which don't
> match the current NaCl architecture.
>
> BUG=409948
> TEST=install an extension which uses NaCl (QuickOffice for example). Rename the _platform-specific/<your-nacl-arch> directory some something else and force an update (e.g. via chrome://extensions button). Observe that a new CRX is downloaded and installed.
>
> Committed: https://chromium.googlesource.com/chromium/src/+/4a92281fa5d331860d65a59ba45dc882a5c71df4

TBR=sorin@chromium.org,yoz@chromium.org,shuchen@chromium.org,rockot@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=409948

Review URL: https://codereview.chromium.org/532183003

Cr-Commit-Position: refs/heads/master@{#293128}