Comment 2 for bug 1308229

StacktraceTop:
 ?? ()
 BrowserContextKeyedServiceFactory::GetServiceForBrowserContext (this=0x7fcae846bfa8 <_ZN10extensionsL9g_factoryE+8>, context=0x7fcaea080840, create=<optimized out>) at ../../components/browser_context_keyed_service/browser_context_keyed_service_factory.cc:65
 ChromeRenderMessageFilter::OpenChannelToExtensionOnUIThread (this=<optimized out>, source_process_id=20, source_routing_id=2, receiver_port_id=377, info=..., channel_name=..., include_tls_channel_id=false) at ../../chrome/browser/renderer_host/chrome_render_message_filter.cc:265
 Run (a1=<optimized out>, a2=<optimized out>, a3=<optimized out>, a6=<optimized out>, a5=..., a4=..., object=<optimized out>, this=<synthetic pointer>) at ../../base/bind_internal.h:530
 MakeItSo (a1=<optimized out>, a2=<optimized out>, a3=<optimized out>, a4=<optimized out>, a7=<optimized out>, a6=..., a5=..., runnable=...) at ../../base/bind_internal.h:1065