Make the request initiator Optional

net/url_request/url_request.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.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 450 matching lines @@
   DCHECK(!is_pending_);
   first_party_for_cookies_ = first_party_for_cookies;
 }
 
 void URLRequest::set_first_party_url_policy(
     FirstPartyURLPolicy first_party_url_policy) {
   DCHECK(!is_pending_);
   first_party_url_policy_ = first_party_url_policy;
 }
 
-void URLRequest::set_initiator(const url::Origin& initiator) {
+void URLRequest::set_initiator(const base::Optional<url::Origin>& initiator) {
   DCHECK(!is_pending_);
+  DCHECK(!initiator.has_value() || initiator.value().unique() ||
+         initiator.value().GetURL().is_valid());
   initiator_ = initiator;
 }
 
 void URLRequest::set_method(const std::string& method) {
   DCHECK(!is_pending_);
   method_ = method;
 }
 
 void URLRequest::SetReferrer(const std::string& referrer) {
   DCHECK(!is_pending_);
@@ skipping 740 matching lines @@
     out->clear();
 }
 
 void URLRequest::set_status(URLRequestStatus status) {
   DCHECK(status_.is_io_pending() || status_.is_success() ||
          (!status.is_success() && !status.is_io_pending()));
   status_ = status;
 }
 
 }  // namespace net