Bug 1579047 - _NS_NEXT_TOKEN in the wrong place. r=Ehsan

Differential Revision: https://phabricator.services.mozilla.com/D44816

--HG--
extra : moz-landing-system : lando

netwerk/protocol/http/AlternateServices.cpp

@@ -437,8 +437,8 @@ AltSvcMapping::AltSvcMapping(DataStorage* storage, int32_t epoch,
     _NS_NEXT_TOKEN;
     mTopWindowOrigin = Substring(str, start, idx - start);
     separator = ':';
-    mIsolated = Substring(str, start, idx - start).EqualsLiteral("y");
     _NS_NEXT_TOKEN;
+    mIsolated = Substring(str, start, idx - start).EqualsLiteral("y");
     // Add code to deserialize new members here!
 #undef _NS_NEXT_TOKEN