Bug 1508377 - properly update XHR status when one is aborted because of an NS_BINDING_ABORTED confition such as window.stop(); r=baku

properly update XHR status when one is aborted because of an NS_BINDING_ABORTED confition such as window.stop()

Differential Revision: https://phabricator.services.mozilla.com/D22852

dom/xhr/XMLHttpRequestMainThread.cpp

@@ -2068,6 +2068,7 @@ XMLHttpRequestMainThread::OnStopRequest(nsIRequest* request,
     mFlagParseBody = false;
     IgnoredErrorResult rv;
     RequestErrorSteps(ProgressEventType::abort, NS_OK, rv);
+    ChangeState(XMLHttpRequest_Binding::UNSENT, false);
     return NS_OK;
   }