The culprit seems likely (the crash has something to do with ResourceCoordinator).

The CL is being reverted for another issue ( bug 906353 ), so I'm marking this
as duplicate. However, the crash stack seems different from the other issue,
so the author may want to look at both issues before relanding.

BrowserTestBase received signal: Segmentation fault. Backtrace:
#0 0x561d87630e8f base::debug::StackTrace::StackTrace()
#1 0x561d87b1c565 content::(anonymous namespace)::DumpStackTraceSignalHandler()
#2 0x7f4ad26e6cb0 <unknown>
#3 0x561d8649129f resource_coordinator::FrameCoordinationUnitImpl::SetProcess()
#4 0x561d892f0e86 resource_coordinator::mojom::FrameCoordinationUnitStubDispatch::Accept()
#5 0x561d882bafab mojo::internal::MultiplexRouter::ProcessIncomingMessage()
#6 0x561d882ba7f5 mojo::internal::MultiplexRouter::Accept()
#7 0x561d882b5c4b mojo::Connector::ReadSingleMessage()
#8 0x561d882b6361 mojo::Connector::ReadAllAvailableMessages()
#9 0x561d87b84bfa mojo::SimpleWatcher::OnHandleReady()
#10 0x561d87646908 base::debug::TaskAnnotator::RunTask()
#11 0x561d875bad8f base::MessageLoopImpl::RunTask()
#12 0x561d875bb243 base::MessageLoopImpl::DoWork()
#13 0x561d87642dd9 base::MessagePumpLibevent::Run()
#14 0x561d875d9715 base::RunLoop::Run()
#15 0x561d85fbb314 content::BrowserProcessSubThread::IOThreadRun()
#16 0x561d8760caff base::Thread::ThreadMain()
#17 0x561d8763d3ce base::(anonymous namespace)::ThreadFunc()
#18 0x7f4ad5c83184 start_thread
#19 0x7f4ad27ae03d clone