Version: ToT as of ec47b3501ce1e462 master@{#383236} Release build with dcheck_always_on
OS: Linux

What steps will reproduce the problem?
(1) Go to http://fusion.net/story/283391/why-is-the-american-media-mostly-ignoring-two-other-terror-attacks-that-happened-this-month/
(2) Scroll down until the assertion hits.

ASSERTION FAILED: m_parsedStyleSheetCache->isInMemoryCache()
../../third_party/WebKit/Source/core/fetch/CSSStyleSheetResource.cpp(164) : WTF::RawPtr<StyleSheetContents> blink::CSSStyleSheetResource::restoreParsedStyleSheet(const blink::CSSParserContext &)
1   0x7f873403ee7b
2   0x7f8733b33630 blink::CSSStyleSheetResource::checkNotify()
3   0x7f8733b508d7 blink::Resource::finish()
4   0x7f8733b66bea blink::ResourceLoader::didFinishLoading(blink::WebURLLoader*, double, long)
5   0x7f873d362788 content::WebURLLoaderImpl::Context::OnCompletedRequest(int, bool, bool, std::string const&, base::TimeTicks const&, long)
6   0x7f873d347da5 content::ResourceDispatcher::OnRequestComplete(int, ResourceMsg_RequestCompleteData const&)
7   0x7f873d345547 content::ResourceDispatcher::DispatchMessage(IPC::Message const&)
8   0x7f873d344dfd content::ResourceDispatcher::OnMessageReceived(IPC::Message const&)
9   0x7f8732caf53f
10  0x7f873ef44a7c base::debug::TaskAnnotator::RunTask(char const*, base::PendingTask const&)
11  0x7f8732ca1c37 scheduler::TaskQueueManager::ProcessTaskFromWorkQueue(scheduler::internal::WorkQueue*, scheduler::internal::TaskQueueImpl::Task*)
12  0x7f8732ca08bf scheduler::TaskQueueManager::DoWork(base::TimeTicks, bool)
13  0x7f8732ca2e74
14  0x7f873ef44a7c base::debug::TaskAnnotator::RunTask(char const*, base::PendingTask const&)
15  0x7f873ef6af6b base::MessageLoop::RunTask(base::PendingTask const&)
16  0x7f873ef6b288 base::MessageLoop::DeferOrRunPendingTask(base::PendingTask const&)
17  0x7f873ef6b4ab base::MessageLoop::DoWork()
18  0x7f873ef6ce2f base::MessagePumpDefault::Run(base::MessagePump::Delegate*)
19  0x7f873ef6aabc base::MessageLoop::RunHandler()
20  0x7f873ef8ebfc base::RunLoop::Run()
21  0x7f873ef69c00 base::MessageLoop::Run()
22  0x7f873d54f8de
23  0x7f873ce9ca3b
24  0x7f873ce9d082
25  0x7f873ce9db03
26  0x7f873ce9c600 content::ContentMain(content::ContentMainParams const&)
27  0x7f873f752da8
28  0x7f873657cec5 __libc_start_main
29  0x7f873f752c71



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