Chrome Version: 64.0.3271.0

What steps will reproduce the problem?
(1) In a build with DCHECK enabled, start an offscreen presentation (e.g. w/ https://googlechrome.github.io/samples/presentation-api/)
(2) Go to chrome://inspect then to "other" then select the page being presented.
(3) Stop the presentation with the devtools window open.
(4) Chrome crashes with the following error:

[145286:145286:1116/142009.560868:FATAL:callback_list.h(166)] Check failed: 0U == callbacks_.size() (0 vs. 1)
#0 0x7ff813fd4ecc base::debug::StackTrace::StackTrace()
#1 0x7ff813ffed7c logging::LogMessage::~LogMessage()
#2 0x7ff812203336 base::internal::CallbackListBase<>::~CallbackListBase()
#3 0x7ff8124c8daf content::HostZoomMapImpl::~HostZoomMapImpl()
#4 0x7ff8124c8dde content::HostZoomMapImpl::~HostZoomMapImpl()
#5 0x7ff8124c5264 content::HostZoomLevelContext::~HostZoomLevelContext()
#6 0x7ff8123fd767 content::StoragePartitionImpl::~StoragePartitionImpl()
#7 0x7ff8123fd9ae content::StoragePartitionImpl::~StoragePartitionImpl()
#8 0x7ff812406f23 std::__1::__tree<>::destroy()
#9 0x7ff812404425 content::StoragePartitionImplMap::~StoragePartitionImplMap()
#10 0x7ff8140591ec std::__1::__tree<>::__erase_unique<>()
#11 0x7ff814058f75 base::SupportsUserData::RemoveUserData()
#12 0x55d69fc535f8 OffTheRecordProfileImpl::~OffTheRecordProfileImpl()
#13 0x55d69fc537ae OffTheRecordProfileImpl::~OffTheRecordProfileImpl()
#14 0x55d6a0838d44 extensions::OffscreenTab::~OffscreenTab()
#15 0x55d6a0838dae extensions::OffscreenTab::~OffscreenTab()
#16 0x55d6a083929e extensions::OffscreenTab::DieIfContentCaptureEnded()
#17 0x7ff81408b478 base::Timer::RunScheduledTask()
#18 0x7ff813fd57ea base::debug::TaskAnnotator::RunTask()
#19 0x7ff814009a16 base::internal::IncomingTaskQueue::RunTask()
#20 0x7ff81400da7b base::MessageLoop::RunTask()
#21 0x7ff81400de3b base::MessageLoop::DeferOrRunPendingTask()
#22 0x7ff81400e414 base::MessageLoop::DoDelayedWork()
#23 0x7ff81400fdf5 base::(anonymous namespace)::WorkSourceDispatch()
#24 0x7ff808d97e04 g_main_context_dispatch
#25 0x7ff808d98048 <unknown>
#26 0x7ff808d980ec g_main_context_iteration
#27 0x7ff81400fb02 base::MessagePumpGlib::Run()
#28 0x7ff81400d31c base::MessageLoop::Run()
#29 0x7ff8140432c5 base::RunLoop::Run()
#30 0x55d69fae94a7 ChromeBrowserMainParts::MainMessageLoopRun()
#31 0x7ff811f4fa47 content::BrowserMainLoop::RunMainMessageLoopParts()
#32 0x7ff811f53723 content::BrowserMainRunnerImpl::Run()
#33 0x7ff811f4b5ea content::BrowserMain()
#34 0x7ff8129c052b content::RunNamedProcessTypeMain()
#35 0x7ff8129c1006 content::ContentMainRunnerImpl::Run()
#36 0x7ff8144f6794 service_manager::Main()
#37 0x7ff8129bf871 content::ContentMain()
#38 0x55d69f5d11cc ChromeMain
#39 0x7ff80727df45 __libc_start_main
#40 0x55d69f5d102a _start

Related to  bug 664351 , I think it is the result of the one-off offscreen tab OTR profile being held by the devtools window.