Two tests are failing:

WebViewAPITest.TestWebRequestAPIWithHeaders
WebViewAPITest.TestLoadStartLoadRedirect

with a similar OOM stack trace:

Received fatal exception 0xe0000008
Backtrace:
	RaiseException [0x74E5C54F+58]
	base::TerminateBecauseOutOfMemory [0x0474CC28+78]
	callnewh [0x71BD4E26+36]
	toupper [0x71BD1C48+68]
	malloc_dbg [0x71BD43CA+1a]
	malloc [0x71BD4CF4+14]
	operator new [0x08420F6D+d] (f:\dd\vctools\crt\vcstartup\src\heap\new_scalar.cpp:13)
	std::_Allocate [0x083EBC88+98]
	std::allocator<char>::allocate [0x083EC4D2+32]
	std::basic_string<char,std::char_traits<char>,std::allocator<char> >::_Construct_lv_contents [0x083ECC00+e0]
	std::basic_string<char,std::char_traits<char>,std::allocator<char> >::basic_string<char,std::char_traits<char>,std::allocator<char> > [0x083E51E9+69]
	url::SchemeHostPort::SchemeHostPort [0x083F1AF1+21]
	url::Origin::Origin [0x083F2CC1+21]
	base::Optional<url::Origin>::value_or<url::Origin> [0x011A91BE+3e]
	extensions::declarative_net_request::RulesetManager::ShouldBlockRequest [0x011A8E6F+18f]
	extensions::ExtensionWebRequestEventRouter::OnBeforeRequest [0x014D367E+14e]
	extensions::ShellNetworkDelegate::OnBeforeURLRequest [0x024226E1+e1]
	net::NetworkDelegate::NotifyBeforeURLRequest [0x0BD13D01+4d1]
	net::URLRequest::Start [0x0C8A91C8+358]
	net::URLRequest::Redirect [0x0C8AD54D+2dd]
	net::URLRequestJob::FollowRedirect [0x0C8FBD60+20]
	net::URLRequestJob::FollowDeferredRedirect [0x0C8FBC3B+10b]
	net::URLRequest::FollowDeferredRedirect [0x0C8ACBB4+1c4]
	content::ResourceLoader::FollowDeferredRedirectInternal [0x12CC9A72+182]
	content::ResourceLoader::Resume [0x12CC8C15+295]
	content::ResourceLoader::Controller::Resume [0x12CCCD00+30]
	content::StreamResourceHandler::OnRequestRedirected [0x12CD8A36+26]
	content::LayeredResourceHandler::OnRequestRedirected [0x12C2DA23+143]
	content::ThrottlingResourceHandler::OnRequestRedirected [0x12CDE422+322]
	content::NavigationResourceHandler::FollowRedirect [0x12C3F65F+28f]
	content::NavigationURLLoaderImplCore::FollowRedirect [0x12C48B65+155]
	??$Invoke@V?$scoped_refptr@VNavigationURLLoaderImplCore@content@@@@$$V@?$FunctorTraits@P8NavigationURLLoaderImplCore@content@@AEXXZX@internal@base@@SAXP8NavigationURLLoaderImplCore@content@@AEXXZ$$QAV?$scoped_refptr@VNavigationURLLoaderImplCore@content@@@ [0x12C47844+34]
	base::internal::InvokeHelper<0,void>::MakeItSo<void (__thiscall content::NavigationURLLoaderImplCore::*)(void),scoped_refptr<content::NavigationURLLoaderImplCore> > [0x12C47786+66]
	base::internal::Invoker<base::internal::BindState<void (__thiscall content::NavigationURLLoaderImplCore::*)(void),scoped_refptr<content::NavigationURLLoaderImplCore> >,void __cdecl(void)>::RunImpl<void (__thiscall content::NavigationURLLoaderImplCore::*)( [0x12C476BA+4a]
	base::internal::Invoker<base::internal::BindState<void (__thiscall content::NavigationURLLoaderImplCore::*)(void),scoped_refptr<content::NavigationURLLoaderImplCore> >,void __cdecl(void)>::RunOnce [0x12C47564+54]
	base::OnceCallback<void __cdecl(void)>::Run [0x045441F0+50]
	base::debug::TaskAnnotator::RunTask [0x045BD257+3f7]
	base::internal::IncomingTaskQueue::RunTask [0x046695A1+f1]
	base::MessageLoop::RunTask [0x046750CE+3de]
	base::MessageLoop::DeferOrRunPendingTask [0x04675B9A+4a]
	base::MessageLoop::DoWork [0x04675E68+1c8]
	base::MessagePumpForIO::DoRunLoop [0x0468461C+1c]
	base::MessagePumpWin::Run [0x04682113+c3]
	base::MessageLoop::Run [0x046747AA+21a]
	base::RunLoop::Run [0x0476D55F+20f]
	base::Thread::Run [0x0486953D+19d]
	content::BrowserThreadImpl::IOThreadRun [0x12186FB4+54]
	content::BrowserThreadImpl::Run [0x121872E8+238]
	base::Thread::ThreadMain [0x0486A034+574]
	base::PlatformThread::GetCurrentThreadPriority [0x048366DF+48f]
	BaseThreadInitThunk [0x7658338A+12]
	RtlInitializeExceptionChain [0x774B9902+63]
	RtlInitializeExceptionChain [0x774B98D5+36]

Failing builds:

https://luci-milo.appspot.com/buildbot/chromium.win/Win7%20Tests%20%28dbg%29%281%29/65991
https://luci-milo.appspot.com/buildbot/chromium.win/Win7%20Tests%20%28dbg%29%281%29/65989