According to this startup profile, CrashService.jsm runs during startup and imports osfile.jsm. We should migrate this to the new IOUtils replacement for osfile.jsm when possible.

Stack:

XREMain::XRE_main []
XREMain::XRE_main(int, char**, mozilla::BootstrapConfig const&) [libxul.so]
XREMain::XRE_mainRun() [libxul.so]
nsXREDirProvider::DoStartup() [libxul.so]
NS_CreateServicesFromCategory(char const*, nsISupports*, char const*, char16_t const*) [libxul.so]
nsCOMPtr_base::assign_from_gs_contractid(nsGetServiceByContractID, nsID const&) [libxul.so]
nsGetServiceByContractID::operator()(nsID const&, void**) const [libxul.so]
mozilla::xpcom::CreateInstanceImpl(mozilla::xpcom::ModuleID, nsISupports*, nsID const&, void**) [libxul.so]
mozilla::xpcom::ConstructJSMComponent(nsTSubstring<char> const&, char const*, nsISupports**) [libxul.so]
mozJSComponentLoader::Import(JSContext*, nsTSubstring<char> const&, JS::MutableHandle<JSObject*>, JS::MutableHandle<JSObject*>, bool) [libxul.so]
component loader load module []
mozJSComponentLoader::ObjectForLocation(ComponentLoaderInfo&, nsIFile*, JS::MutableHandle<JSObject*>, JS::MutableHandle<JSScript*>, char**, bool, JS::MutableHandle<JS::Value>) [libxul.so]
js::ExecuteInJSMEnvironment(JSContext*, JS::Handle<JSScript*>, JS::Handle<JSObject*>) [libxul.so]
js::ExecuteInJSMEnvironment(JSContext*, JS::Handle<JSScript*>, JS::Handle<JSObject*>, JS::Handle<JS::StackGCVector<JSObject*, js::TempAllocPolicy> >) [libxul.so]
ExecuteInExtensibleLexicalEnvironment(JSContext*, JS::Handle<JSScript*>, JS::Handle<JSObject*>) [libxul.so]
js::RunScript []
> resource://gre/modules/CrashService.jsm []
js::ExecuteKernel(JSContext*, JS::Handle<JSScript*>, JS::Handle<JSObject*>, JS::Handle<JS::Value>, js::AbstractFramePtr, JS::MutableHandle<JS::Value>) [libxul.so]
Interpret(JSContext*, js::RunState&) [libxul.so]
js::InternalCallOrConstruct(JSContext*, JS::CallArgs const&, js::MaybeConstruct, js::CallReason) [libxul.so]
ChromeUtils.import []
mozilla::dom::ChromeUtils_Binding::import(JSContext*, unsigned int, JS::Value*) [libxul.so]
> ChromeUtils::Import resource://gre/modules/osfile.jsm []
mozilla::dom::ChromeUtils::Import(mozilla::dom::GlobalObject const&, nsTSubstring<char16_t> const&, mozilla::dom::Optional<JS::Handle<JSObject*> > const&, JS::MutableHandle<JSObject*>, mozilla::ErrorResult&) [libxul.so]
mozJSComponentLoader::Import(JSContext*, nsTSubstring<char> const&, JS::MutableHandle<JSObject*>, JS::MutableHandle<JSObject*>, bool) [libxul.so]
profiler_get_backtrace() [libxul.so]
Registers::SyncPopulate() [libxul.so]

Depends on D87488

Backed out for perma failures. See https://bugzilla.mozilla.org/show_bug.cgi?id=1660328#c5

Backed out 3 changesets (Bug 1649595, Bug 1649596, Bug 1649593) for causing failures in ExtensionParent.jsm

Push with failures: https://treeherder.mozilla.org/#/jobs?repo=autoland&group_state=expanded&selectedTaskRun=SXYl3CyzSnKtISIX2nnK8A.0&resultStatus=pending%2Crunning%2Ctestfailed%2Cbusted%2Cexception&searchStr=linux%2C18.04%2Cx64%2Ctsan%2Copt%2Cxpcshell%2Ctests%2Ctest-linux1804-64-tsan%2Fopt-xpcshell-e10s%2Cx3&revision=ff93a88d2de232038327da95b143cf6b89ee8d69

Failure log: https://treeherder.mozilla.org/logviewer.html#/jobs?job_id=314443126&repo=autoland&lineNumber=3246

Backout: https://hg.mozilla.org/integration/autoland/rev/0b58d4793d6be1bcace9022cae96a9741db6e926

I'm taking these bugs over from :krourke since his internship is over.

https://hg.mozilla.org/mozilla-central/rev/1eed063f5bdc