Version: 56.0.2914.0
OS: Linux

In recent Linux builds when the Gamepad API is used shutting down the browser will cause a crash in base::FileDescriptorWatcher. Stack Trace:

[159895:159895:1109/154520:FATAL:file_descriptor_watcher_posix.cc(29)] Check failed: sequence_checker_.CalledOnValidSequence(). 
#0 0x7fdc1e26ccce base::debug::StackTrace::StackTrace()
#1 0x7fdc1e290feb logging::LogMessage::~LogMessage()
#2 0x7fdc1e27222c base::FileDescriptorWatcher::Controller::~Controller()
#3 0x7fdc136c1bd9 device::UdevLinux::~UdevLinux()
#4 0x7fdc136bbb4e device::GamepadPlatformDataFetcherLinux::~GamepadPlatformDataFetcherLinux()
#5 0x7fdc136bbb79 device::GamepadPlatformDataFetcherLinux::~GamepadPlatformDataFetcherLinux()
#6 0x7fdc136bcf55 device::GamepadProvider::~GamepadProvider()
#7 0x7fdc136bd029 device::GamepadProvider::~GamepadProvider()
#8 0x7fdc1bb479f2 content::BrowserMainLoop::ShutdownThreadsAndCleanUp()
#9 0x7fdc1bb4a123 content::BrowserMainRunnerImpl::Shutdown()
#10 0x7fdc1bb42349 content::BrowserMain()
#11 0x7fdc1c2ec577 content::RunNamedProcessTypeMain()
#12 0x7fdc1c2ecfeb content::ContentMainRunnerImpl::Run()
#13 0x7fdc1c2eb960 content::ContentMain()
#14 0x7fdc1ecec1dd ChromeMain
#15 0x7fdc149baf45 __libc_start_main
#16 0x7fdc1ecec0b9 <unknown>

It seems very much like this was introduced as part of this change: https://chromium.googlesource.com/chromium/src/+/92ebb94ad1bdf0d4aef4f74240d4933a945e14d8

To reproduce visit http://html5gamepad.com with a gamepad connected then exit the browser and watch the logs.