When run locally I have noticed that usbDevice-iframe.html occasionally triggers the following renderer crash:

(gdb) bt
#0  v8::base::OS::Abort () at ../../v8/src/base/platform/platform-posix.cc:255
#1  0x00007fcd308efead in OpenHandle (that=0x7fcd31322c1a, 
    allow_empty_handle=<error reading variable: access outside bounds of object referenced via synthetic pointer>) at ../../v8/src/api.h:345
#2  v8::Object::CreationContext (this=0x7fcd31322c1a) at ../../v8/src/api.cc:4987
#3  0x00007fcd2c3adf96 in blink::V8ScriptRunner::CallFunction (function=..., 
    context=0x8ecbdf9b300, receiver=..., argc=0, args=0x0, isolate=0x32b930485020)
    at ../../third_party/WebKit/Source/bindings/core/v8/V8ScriptRunner.cpp:648
#4  0x00007fcd2f2fced0 in blink::WebLocalFrameImpl::CallFunctionEvenIfScriptDisabled (
    this=0x91aa5ba1e28, function=..., receiver=..., argc=0, argv=0x0)
    at ../../third_party/WebKit/Source/web/WebLocalFrameImpl.cpp:852
#5  0x00007fcd2f2fd032 in non-virtual thunk to blink::WebLocalFrameImpl::CallFunctionEvenIfScriptDisabled(v8::Local<v8::Function>, v8::Local<v8::Value>, int, v8::Local<v8::Value>*) () at ../../third_party/WebKit/Source/platform/heap/Persistent.h:737
#6  0x00007fcd39d37e37 in content::MojoMainRunner::Call (this=0x32b930a73680, 
    function=..., receiver=..., argc=0, argv=0x0)
    at ../../content/renderer/mojo_main_runner.cc:48
#7  0x00007fcd315ca642 in gin::Timer::OnTimerFired (this=0x32b930967d40)
    at ../../gin/modules/timer.cc:74
#8  0x00007fcd315cbde7 in base::internal::FunctorTraits<void (gin::Timer::*)(), void>::Invoke<base::WeakPtr<gin::Timer> const&> (
    method=(void (gin::Timer::*)(gin::Timer * const)) 0x7fcd315ca370 <gin::Timer::OnTimerFired()>, receiver_ptr=...) at ../../base/bind_internal.h:214
#9  0x00007fcd315cbd3a in base::internal::InvokeHelper<true, void>::MakeItSo<void (gin::Timer::* const&)(), base::WeakPtr<gin::Timer> const&> (
    functor=@0x32b9308dbbc8: <error reading variable>, weak_ptr=...)
    at ../../base/bind_internal.h:305
#10 0x00007fcd315cbcc2 in base::internal::Invoker<base::internal::BindState<void (gin::Timer::*)(), base::WeakPtr<gin::Timer> >, void ()>::RunImpl<void (gin::Timer::* const&)(), std::tuple<base::WeakPtr<gin::Timer> > const&, 0ul>(void (gin::Timer::* const&)(), std::tuple<base::WeakPtr<gin::Timer> > const&, base::IndexSequence<0ul>) (
    functor=@0x32b9308dbbc8: <error reading variable>, bound=empty std::tuple)
    at ../../base/bind_internal.h:361
#11 0x00007fcd315cbc0c in base::internal::Invoker<base::internal::BindState<void (gin::Timer::*)(), base::WeakPtr<gin::Timer> >, void ()>::Run(base::internal::BindStateBase*) (
    base=0x32b9308dbba0) at ../../base/bind_internal.h:339
#12 0x00007fcd36cf701d in base::Callback<void (), (base::internal::CopyMode)1, (base::internal::RepeatMode)1>::Run() const & (this=0x7ffc9af14ed8) at ../../base/callback.h:80
#13 0x00007fcd36f32ce2 in base::Timer::RunScheduledTask (this=0x32b930967d50)
    at ../../base/timer/timer.cc:229
#14 0x00007fcd36f32dc9 in base::BaseTimerTaskInternal::Run (this=0x32b9307b2ca0)
    at ../../base/timer/timer.cc:53
#15 0x00007fcd36d59f45 in base::internal::FunctorTraits<void (base::FileDescriptorWatcher::Controller::Watcher::*)(), void>::Invoke<base::FileDescriptorWatcher::Controller::Watcher*>(void (base::FileDescriptorWatcher::Controller::Watcher::*)(), base::FileDescriptorWatcher::Controller::Watcher*&&) (
    method=(void (base::FileDescriptorWatcher::Controller::Watcher::*)(base::FileDescriptorWatcher::Controller::Watcher * const)) 0x7fcd36f32d80 <base::BaseTimerTaskInternal::Run()>, 
    receiver_ptr=<unknown type in /src/chromium/src/out/Debug/./libbase.so, CU 0x0, DIE 0xac57>) at ../../base/bind_internal.h:214
#16 0x00007fcd36f33011 in base::internal::InvokeHelper<false, void>::MakeItSo<void (base::BaseTimerTaskInternal::* const&)(), base::BaseTimerTaskInternal*>(void (base::BaseTimerTaskInternal::* const&)(), base::BaseTimerTaskInternal*&&) (
    functor=@0x32b9307fa148: <error reading variable>, 
    args=<unknown type in /src/chromium/src/out/Debug/./libbase.so, CU 0x0, DIE 0x6995>)
    at ../../base/bind_internal.h:285
#17 0x00007fcd36f32fb7 in base::internal::Invoker<base::internal::BindState<void (base::BaseTimerTaskInternal::*)(), base::internal::OwnedWrapper<base::BaseTimerTaskInternal> >, void ()>::RunImpl<void (base::BaseTimerTaskInternal::* const&)(), std::tuple<base::internal::OwnedWrapper<base::BaseTimerTaskInternal> > const&, 0ul>(void (base::BaseTimerTaskInternal::* const&)(), std::tuple<base::internal::OwnedWrapper<base::BaseTimerTaskInternal> > const&, base::IndexSequence<0ul>) (functor=@0x32b9307fa148: <error reading variable>, 
    bound=empty std::tuple) at ../../base/bind_internal.h:361
#18 0x00007fcd36f32efc in base::internal::Invoker<base::internal::BindState<void (base::BaseTimerTaskInternal::*)(), base::internal::OwnedWrapper<base::BaseTimerTaskInternal> >, void ()>::Run(base::internal::BindStateBase*) (base=0x32b9307fa120)
    at ../../base/bind_internal.h:339
#19 0x00007fcd36d4557e in base::Callback<void (), (base::internal::CopyMode)0, (base::internal::RepeatMode)0>::Run() && (this=0x7ffc9af155f8) at ../../base/callback.h:91
#20 0x00007fcd36d44cbe in base::debug::TaskAnnotator::RunTask (this=0x32b93006da48, 
    queue_function=0x7fcd30377082 "TaskQueueManager::PostTask", 
    pending_task=0x7ffc9af155e0) at ../../base/debug/task_annotator.cc:59
#21 0x00007fcd2fccd395 in blink::scheduler::TaskQueueManager::ProcessTaskFromWorkQueue (
    this=0x32b93006d920, work_queue=0x32b930536f50, is_nested=false, 
    time_before_task=..., time_after_task=0x7ffc9af15990)
    at ../../third_party/WebKit/Source/platform/scheduler/base/task_queue_manager.cc:539
#22 0x00007fcd2fcca2dd in blink::scheduler::TaskQueueManager::DoWork (
    this=0x32b93006d920, delayed=false)
    at ../../third_party/WebKit/Source/platform/scheduler/base/task_queue_manager.cc:337
#23 0x00007fcd2fcd5684 in base::internal::FunctorTraits<void (blink::scheduler::TaskQueueManager::*)(bool), void>::Invoke<base::WeakPtr<blink::scheduler::TaskQueueManager> const&, bool const&> (method=
    (void (blink::scheduler::TaskQueueManager::*)(blink::scheduler::TaskQueueManager * const, bool)) 0x7fcd2fcc9cf0 <blink::scheduler::TaskQueueManager::DoWork(bool)>, 
    receiver_ptr=..., args=@0x32b93056d208: <error reading variable>)
    at ../../base/bind_internal.h:214
#24 0x00007fcd2fcd558f in base::internal::InvokeHelper<true, void>::MakeItSo<void (blink::scheduler::TaskQueueManager::* const&)(bool), base::WeakPtr<blink::scheduler::TaskQueueManager> const&, bool const&> (functor=@0x32b93056d1f8: <error reading variable>, 
    weak_ptr=..., args=@0x32b93056d208: <error reading variable>)
    at ../../base/bind_internal.h:305
#25 0x00007fcd2fcd5503 in base::internal::Invoker<base::internal::BindState<void (blink::scheduler::TaskQueueManager::*)(bool), base::WeakPtr<blink::scheduler::TaskQueueManager>, bool>, void ()>::RunImpl<void (blink::scheduler::TaskQueueManager::* const&)(bool), std::tuple<base::WeakPtr<blink::scheduler::TaskQueueManager>, bool> const&, 0ul, 1ul>(void (blink::scheduler::TaskQueueManager::* const&)(bool), std::tuple<base::WeakPtr<blink::scheduler::TaskQueueManager>, bool> const&, base::IndexSequence<0ul, 1ul>) (
    functor=@0x32b93056d1f8: <error reading variable>, bound=empty std::tuple)
    at ../../base/bind_internal.h:361
#26 0x00007fcd2fcd541c in base::internal::Invoker<base::internal::BindState<void (blink::scheduler::TaskQueueManager::*)(bool), base::WeakPtr<blink::scheduler::TaskQueueManager>, bool>, void ()>::Run(base::internal::BindStateBase*) (base=0x32b93056d1d0)
    at ../../base/bind_internal.h:339
#27 0x00007fcd36d4557e in base::Callback<void (), (base::internal::CopyMode)0, (base::internal::RepeatMode)0>::Run() && (this=0x7ffc9af169b0) at ../../base/callback.h:91
#28 0x00007fcd36d44cbe in base::debug::TaskAnnotator::RunTask (this=0x32b9301ee000, 
    queue_function=0x7fcd3706452c "MessageLoop::PostTask", pending_task=0x7ffc9af16998)
    at ../../base/debug/task_annotator.cc:59
#29 0x00007fcd36dd4ebd in base::MessageLoop::RunTask (this=0x32b9301edde0, 
    pending_task=0x7ffc9af16998) at ../../base/message_loop/message_loop.cc:423
#30 0x00007fcd36dd5144 in base::MessageLoop::DeferOrRunPendingTask (
    this=0x32b9301edde0, pending_task=...)
    at ../../base/message_loop/message_loop.cc:434
#31 0x00007fcd36dd5434 in base::MessageLoop::DoWork (this=0x32b9301edde0)
    at ../../base/message_loop/message_loop.cc:527
#32 0x00007fcd36dec568 in base::MessagePumpDefault::Run (this=0x32b930414ca0, 
    delegate=0x32b9301edde0) at ../../base/message_loop/message_pump_default.cc:33
#33 0x00007fcd36dd4a57 in base::MessageLoop::RunHandler (this=0x32b9301edde0)
    at ../../base/message_loop/message_loop.cc:387
#34 0x00007fcd36e7732a in base::RunLoop::Run (this=0x7ffc9af174f0)
    at ../../base/run_loop.cc:37
#35 0x00007fcd39e59f7d in content::RendererMain (parameters=...)
    at ../../content/renderer/renderer_main.cc:200
#36 0x00007fcd3a28dc2d in content::RunZygote (main_function_params=..., 
    delegate=0x7ffc9af181b8) at ../../content/app/content_main_runner.cc:366
#37 0x00007fcd3a28dfe0 in content::RunNamedProcessTypeMain (
    process_type=<error reading variable: Cannot access memory at address 0x32b92fff67a0>, main_function_params=..., delegate=0x7ffc9af181b8)
    at ../../content/app/content_main_runner.cc:445
#38 0x00007fcd3a29018c in content::ContentMainRunnerImpl::Run (this=0x32b92ffde890)
    at ../../content/app/content_main_runner.cc:729
#39 0x00007fcd3a28d34a in content::ContentServiceManagerMainDelegate::Run (
    this=0x7ffc9af18150)
    at ../../content/app/content_service_manager_main_delegate.cc:36
#40 0x00007fcd27ce0be8 in service_manager::Main (params=...)
    at ../../services/service_manager/embedder/main.cc:179
#41 0x00007fcd3a28d9af in content::ContentMain (params=...)
    at ../../content/app/content_main.cc:19
#42 0x00000000004a8ab1 in main (argc=8, argv=0x7ffc9af18308)
    at ../../content/shell/app/shell_main.cc:48