Bug 1236650 - make h2 push work in the face of redirects. r=mcmanus

--HG--
extra : rebase_source : 2ebbaf8d42802575fc3f51db8c1b84629cb0e53b

netwerk/protocol/http/HttpBaseChannel.cpp

@@ -2828,6 +2828,9 @@ HttpBaseChannel::SetupReplacementChannel(nsIURI       *newURI,
     }
   }
 
+  // share the scheduling context - see bug 1236650
+  httpChannel->SetSchedulingContextID(mSchedulingContextID);
+
   if (httpInternal) {
     // Convey third party cookie and spdy flags.
     httpInternal->SetThirdPartyFlags(mThirdPartyFlags);