Backed out changeset a4b43a47589a (bug 1498782) for causing multimple failures e.g.: ts_paint_webext CLOSED TREE

netwerk/dns/nsHostResolver.cpp

@@ -870,12 +870,7 @@ nsHostResolver::Shutdown()
                              "Failed to shutdown GetAddrInfo");
     }
 
-    // It is possible that there are still threads waiting on a very slow DNS
-    // query. In that case, it's better just to skip the thread shutdown,
-    // or we might trigger the shutdownhang reporter.
-    if (mActiveTaskCount == 0) {
-        mResolverThreads->Shutdown();
-    }
+    mResolverThreads->Shutdown();
 }
 
 nsresult