Google Chrome	57.0.2957.0 (Official Build) dev (64-bit)
Revision	0
Platform	9107.0.0 (Official Build) dev-channel samus

What steps will reproduce the problem?
(1) AU to 9107.0.0, 57.0.2957.0 build
(2) Log-in to user account that already has ARC++ enabled with some apps pinned to shelf
(3) Before the container loads, click on any ARC++ app from shelf

What happens instead?
Black screen and sometimes followed by browser crash.

Crash link: https://crash.corp.google.com/browse?stbtiq=6537f0c080000000

Magic Signature: ArcAppListPrefs::IsRegistered 
Stable Signature: ArcAppListPrefs::IsRegistered-3d4f29ad

Thread 0 CRASHED [SIGSEGV @ 0xffffe58c2738f000 ] MAGIC SIGNATURE THREAD
Stack Quality98%Show frame trust levels
0x0000637c3a68cd96	(chrome -string_piece.h:186 )	ArcAppListPrefs::IsRegistered(std::string const&) const
0x0000637c3a68ce5e	(chrome -arc_app_list_prefs.cc:533 )	ArcAppListPrefs::SetLastLaunchTime(std::string const&, base::Time const&)
0x0000637c3a694a21	(chrome -arc_app_utils.cc:329 )	arc::LaunchApp(content::BrowserContext*, std::string const&, bool, int)
0x0000637c3a60cabf	(chrome -launcher_controller_helper.cc:182 )	LauncherControllerHelper::LaunchAppWithLaunchId(std::string const&, std::string const&, ash::LaunchSource, int)
0x0000637c3a7d4445	(chrome -app_shortcut_launcher_item_controller.cc:130 )	AppShortcutLauncherItemController::Activate(ash::LaunchSource)
0x0000637c3a4ac444	(chrome -shelf_view.cc:597 )	ash::ShelfView::ButtonPressed(views::Button*, ui::Event const&, views::InkDrop*)
0x0000637c39d0f50f	(chrome -custom_button.cc:198 )	views::CustomButton::OnMouseReleased(ui::MouseEvent const&)
0x0000637c3a5033f0	(chrome -shelf_button.cc:382 )	ash::ShelfButton::OnMouseReleased(ui::MouseEvent const&)
0x0000637c39d53dcb	(chrome -ink_drop_host_view.cc:262 )	views::InkDropHostView::OnMouseEvent(ui::MouseEvent*)
0x0000637c3bbec2f3	(chrome -scoped_target_handler.cc:32 )	ui::ScopedTargetHandler::OnEvent(ui::Event*)
0x0000637c393eaf76	(chrome -event_dispatcher.cc:191 )	ui::EventDispatcher::DispatchEvent(ui::EventHandler*, ui::Event*)
0x0000637c393eb360	(chrome -event_dispatcher.cc:139 )	ui::EventDispatcher::ProcessEvent(ui::EventTarget*, ui::Event*)
0x0000637c393eb446	(chrome -event_dispatcher.cc:86 )	ui::EventDispatcherDelegate::DispatchEventToTarget(ui::EventTarget*, ui::Event*)
0x0000637c393eb53f	(chrome -event_dispatcher.cc:58 )	ui::EventDispatcherDelegate::DispatchEvent(ui::EventTarget*, ui::Event*)
0x0000637c39d6ebeb	(chrome -root_view.cc:442 )	views::internal::RootView::OnMouseReleased(ui::MouseEvent const&)
0x0000637c39d466b0	(chrome -widget.cc:1203 )	views::Widget::OnMouseEvent(ui::MouseEvent*)
0x0000637c393eaf76	(chrome -event_dispatcher.cc:191 )	ui::EventDispatcher::DispatchEvent(ui::EventHandler*, ui::Event*)
0x0000637c393eb360	(chrome -event_dispatcher.cc:139 )	ui::EventDispatcher::ProcessEvent(ui::EventTarget*, ui::Event*)
0x0000637c393eb446	(chrome -event_dispatcher.cc:86 )	ui::EventDispatcherDelegate::DispatchEventToTarget(ui::EventTarget*, ui::Event*)
0x0000637c393eb53f	(chrome -event_dispatcher.cc:58 )	ui::EventDispatcherDelegate::DispatchEvent(ui::EventTarget*, ui::Event*)
0x0000637c3bbec226	(chrome -event_processor.cc:35 )	ui::EventProcessor::OnEventFromSource(ui::Event*)
0x0000637c393ebca2	(chrome -event_source.cc:73 )	ui::EventSource::DeliverEventToProcessor(ui::Event*)
0x0000637c393ebe62	(chrome -event_source.cc:51 )	ui::EventSource::SendEventToProcessor(ui::Event*)
0x0000637c3a47bd2e	(chrome -ash_window_tree_host_platform.cc:111 )	ash::AshWindowTreeHostPlatform::DispatchEvent(ui::Event*)
0x0000637c393ec832	(chrome -callback.h:85 )	ui::DispatchEventFromNativeUiEvent(void* const&, base::Callback<void (ui::Event*), (base::internal::CopyMode)1, (base::internal::RepeatMode)1>)
0x0000637c37712df4	(chrome -drm_window_host.cc:185 )	ui::DrmWindowHost::DispatchEvent(void* const&)
0x0000637c393cc47e	(chrome -platform_event_source.cc:81 )	ui::PlatformEventSource::DispatchEvent(void*)
0x0000637c3955256b	(chrome -event_factory_evdev.cc:356 )	ui::EventFactoryEvdev::DispatchMouseButtonEvent(ui::MouseButtonEventParams const&)
0x0000637c3729f89c	(chrome -callback.h:68 )	base::debug::TaskAnnotator::RunTask(char const*, base::PendingTask*)
0x0000637c372887f5	(chrome -message_loop.cc:421 )	base::MessageLoop::DoWork()
0x0000637c37289232	(chrome -message_pump_libevent.cc:218 )	base::MessagePumpLibevent::Run(base::MessagePump::Delegate*)
0x0000637c38bf9567	(chrome -run_loop.cc:37 )	base::RunLoop::Run()
0x0000637c388e0ee5	(chrome -chrome_browser_main.cc:1987 )	ChromeBrowserMainParts::MainMessageLoopRun(int*)
0x0000637c37f36a8a	(chrome -browser_main_loop.cc:1173 )	content::BrowserMainLoop::RunMainMessageLoopParts()
0x0000637c37f39844	(chrome -browser_main_runner.cc:141 )	content::BrowserMainRunnerImpl::Run()
0x0000637c37f338cb	(chrome -browser_main.cc:46 )	content::BrowserMain(content::MainFunctionParams const&)
0x0000637c38881299	(chrome -content_main_runner.cc:793 )	content::ContentMainRunnerImpl::Run()
0x0000637c3887ff3a	(chrome -content_main.cc:20 )	content::ContentMain(content::ContentMainParams const&)
0x0000637c3751279a	(chrome -chrome_main.cc:112 )	ChromeMain
0x00007ead0aa83fb5	(libc-2.19.so -libc-start.c:292 )	__libc_start_main
0x0000637c375125c2	(chrome + 0x0123a5c2 )	_start