Bug 1532994: Part 2 - Support SetHref() and Replace() in RemoteLocationProxy. r=farre

MANUAL PUSH: Can't update phabricator patch.

Differential Revision: https://phabricator.services.mozilla.com/D43328

docshell/base/nsDocShellLoadState.cpp

@@ -49,6 +49,7 @@ nsDocShellLoadState::nsDocShellLoadState(DocShellLoadStateInit& aLoadState) {
   mOriginalFrameSrc = aLoadState.OriginalFrameSrc();
   mIsFormSubmission = aLoadState.IsFormSubmission();
   mLoadType = aLoadState.LoadType();
+  mSrcdocData.SetIsVoid(true);
   mTarget = aLoadState.Target();
   mLoadFlags = aLoadState.LoadFlags();
   mFirstParty = aLoadState.FirstParty();