ToT today.

- Enable the docked magnifier (Search+Ctrl+D).
- Click on the launcher icon in the shelf.
- Chrome crashes at the DCHECK_LE(current_height_above_peeking, fullscreen_height_above_peeking);

[181376:181376:1011/131600.751629:FATAL:app_list_view.cc(1505)] Check failed: current_height_above_peeking <= fullscreen_height_above_peeking (484 vs. 218)
#0 0x7f646ff25e7f base::debug::StackTrace::StackTrace()
#1 0x7f646fe5956b logging::LogMessage::~LogMessage()
#2 0x7f645e333649 app_list::AppListView::GetAppListTransitionProgress()
#3 0x7f645e33341c app_list::AppListView::Layout()
#4 0x7f6469e5ae83 views::View::SetBoundsRect()
#5 0x7f6469e4ff38 views::FillLayout::Layout()
#6 0x7f6469e5d960 views::View::Layout()
#7 0x7f6469e6aa54 views::Widget::SetContentsView()
#8 0x7f6469e6a1b9 views::Widget::Init()
#9 0x7f645e33247a app_list::AppListView::InitializeFullscreen()
#10 0x7f645e332036 app_list::AppListView::Initialize()
#11 0x7f64695a0bf0 ash::AppListPresenterDelegateImpl::Init()
#12 0x7f645e3aa028 app_list::AppListPresenterImpl::Show()
#13 0x7f646959c7d2 ash::AppListControllerImpl::ToggleAppList()
#14 0x7f646967a7ae ash::AppListShelfItemDelegate::ItemSelected()
#15 0x7f646969983f ash::ShelfView::ButtonPressed()
#16 0x7f6469df0b84 views::Button::OnMousePressed()
#17 0x7f6469679b92 ash::AppListButton::OnMousePressed()
#18 0x7f6469e5ffb4 views::View::ProcessMousePressed()
#19 0x7f6469e5fe07 views::View::OnMouseEvent()
#20 0x7f6469ddd919 views::InkDropHostView::OnMouseEvent()
#21 0x7f646b8bcd8a ui::EventHandler::OnEvent()
#22 0x7f646b8bbd5e ui::EventDispatcher::ProcessEvent()
#23 0x7f646b8bbaf3 ui::EventDispatcherDelegate::DispatchEvent()
#24 0x7f6469e6704c views::internal::RootView::OnMousePressed()
#25 0x7f6469e6d9e7 views::Widget::OnMouseEvent()
#26 0x7f6469e8a666 views::NativeWidgetAura::OnMouseEvent()
#27 0x7f646b8bcd8a ui::EventHandler::OnEvent()
#28 0x7f646b8bbd5e ui::EventDispatcher::ProcessEvent()
#29 0x7f646b8bbaf3 ui::EventDispatcherDelegate::DispatchEvent()
#30 0x7f646b8bd7c2 ui::EventProcessor::OnEventFromSource()
#31 0x7f646b8bdd8e ui::EventSource::SendEventToSinkFromRewriter()
#32 0x7f6469611164 ash::AshWindowTreeHostPlatform::DispatchEvent()
#33 0x7f646b8c20b9 ui::DispatchEventFromNativeUiEvent()
#34 0x7f6468f815fe ui::X11WindowOzone::DispatchEvent()
#35 0x7f646c014923 ui::PlatformEventSource::DispatchEvent()
#36 0x7f645e1a2c89 ui::X11EventSourceLibevent::DispatchPlatformEvent()
#37 0x7f645e1a2721 ui::X11EventSourceLibevent::ProcessXEvent()
#38 0x7f645e19dae1 ui::X11EventSource::DispatchXEvents()
#39 0x7f646ff49002 base::MessagePumpLibevent::OnLibeventNotification()
#40 0x7f646ff6626d event_base_loop
#41 0x7f646ff4931b base::MessagePumpLibevent::Run()
#42 0x7f646fe67694 base::MessageLoop::Run()
#43 0x7f646fe99d99 base::RunLoop::Run()
#44 0x565131c2dbed ChromeBrowserMainParts::MainMessageLoopRun()
#45 0x7f646d857a17 content::BrowserMainLoop::RunMainMessageLoopParts()
#46 0x7f646d85a516 content::BrowserMainRunnerImpl::Run()
#47 0x7f646d853ff9 content::BrowserMain()
#48 0x7f646e36362e content::ContentMainRunnerImpl::Run()
#49 0x7f64701f30d5 service_manager::Main()
#50 0x7f646e361974 content::ContentMain()
#51 0x565130fa8de3 ChromeMain
#52 0x7f645f5da2b1 __libc_start_main
#53 0x565130fa8c5a _start