--- a/components/safe_browsing/common/safe_browsing_prefs.cc	2017-10-08 19:17:55.337753504 -0400
+++ b/components/safe_browsing/common/safe_browsing_prefs.cc	2017-10-08 19:18:32.830852643 -0400
@@ -372,9 +372,9 @@
   registry->RegisterBooleanPref(
       prefs::kSafeBrowsingSawInterstitialScoutReporting, false);
   registry->RegisterBooleanPref(
-      prefs::kSafeBrowsingExtendedReportingOptInAllowed, true);
+      prefs::kSafeBrowsingExtendedReportingOptInAllowed, false);
   registry->RegisterBooleanPref(
-      prefs::kSafeBrowsingEnabled, true,
+      prefs::kSafeBrowsingEnabled, false,
       user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
   registry->RegisterBooleanPref(prefs::kSafeBrowsingProceedAnywayDisabled,
                                 false);