Enable 'First-Party-Only' cookies by default.

net/base/network_delegate_impl.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/base/network_delegate_impl.h"
 
 #include "net/base/net_errors.h"
 
 namespace net {
 
@@ skipping 87 matching lines @@
     const URLRequest& request) const {
   return false;
 }
 
 bool NetworkDelegateImpl::OnCanEnablePrivacyMode(
     const GURL& url,
     const GURL& first_party_for_cookies) const {
   return false;
 }
 
-bool NetworkDelegateImpl::OnFirstPartyOnlyCookieExperimentEnabled() const {
-  return false;
-}
-
 bool NetworkDelegateImpl::OnCancelURLRequestWithPolicyViolatingReferrerHeader(
     const URLRequest& request,
     const GURL& target_url,
     const GURL& referrer_url) const {
   return false;
 }
 
 }  // namespace net