--- a/chrome/browser/net/prediction_options.h	2017-10-04 18:07:34.000000000 -0400
+++ b/chrome/browser/net/prediction_options.h	2017-10-08 18:56:51.630948424 -0400
@@ -23,7 +23,7 @@
   NETWORK_PREDICTION_ALWAYS,
   NETWORK_PREDICTION_WIFI_ONLY,
   NETWORK_PREDICTION_NEVER,
-  NETWORK_PREDICTION_DEFAULT = NETWORK_PREDICTION_WIFI_ONLY,
+  NETWORK_PREDICTION_DEFAULT = NETWORK_PREDICTION_NEVER,
 };
 
 enum class NetworkPredictionStatus {