First-Party Cookies: Wire it up as an experimental web platform feature

net/url_request/url_request_http_job.cc

 // Copyright (c) 2012 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/url_request/url_request_http_job.h"
 
 #include "base/base_switches.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
@@ skipping 611 matching lines @@
         base::Bind(&URLRequestHttpJob::CheckCookiePolicyAndLoad,
                    weak_factory_.GetWeakPtr()));
   } else {
     DoStartTransaction();
   }
 }
 
 void URLRequestHttpJob::DoLoadCookies() {
   CookieOptions options;
   options.set_include_httponly();
-  options.set_include_first_party_only();
 
-  // TODO(mkwst): Pipe a switch down here to allow us to decide whether we
-  // should enforce "first-party only" cookies or not (by setting |options|'s
-  // first-party-url to the first-party-for-cookies value. crbug.com/459154
+  // TODO(mkwst): Drop this `if` once we decide whether or not to ship
+  // first-party cookies: https://crbug.com/459154
+  if (network_delegate() &&
+      network_delegate()->FirstPartyOnlyCookieExperimentEnabled())
+    options.set_first_party_url(request_->first_party_for_cookies());
+  else
+    options.set_include_first_party_only();
 
   GetCookieStore()->GetCookiesWithOptionsAsync(
       request_->url(), options,
       base::Bind(&URLRequestHttpJob::OnCookiesLoaded,
                  weak_factory_.GetWeakPtr()));
 }
 
 void URLRequestHttpJob::CheckCookiePolicyAndLoad(
     const CookieList& cookie_list) {
   if (CanGetCookies(cookie_list))
@@ skipping 852 matching lines @@
   return override_response_headers_.get() ?
              override_response_headers_.get() :
              transaction_->GetResponseInfo()->headers.get();
 }
 
 void URLRequestHttpJob::NotifyURLRequestDestroyed() {
   awaiting_callback_ = false;
 }
 
 }  // namespace net