Bug 1598520 - Fix missing flags write. r=kmag

Differential Revision: https://phabricator.services.mozilla.com/D57588

--HG--
extra : source : 73c37ad27d188602bf4e4618d015d338b085fd33

netwerk/ipc/DocumentLoadListener.cpp

@@ -726,6 +726,7 @@ void DocumentLoadListener::SerializeRedirectData(
   aArgs.lastVisitInfo() = LastVisitInfo{previousURI, previousFlags};
   aArgs.srcdocData() = mSrcdocData;
   aArgs.baseUri() = mBaseURI;
+  aArgs.loadStateLoadFlags() = mLoadStateLoadFlags;
 }
 
 void DocumentLoadListener::TriggerCrossProcessSwitch() {