Make the request initiator Optional

net/url_request/url_fetcher_impl.h

 // 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.
 
 // This file contains URLFetcher, a wrapper around URLRequest that handles
 // low-level details like thread safety, ref counting, and incremental buffer
 // reading.  This is useful for callers who simply want to get the data from a
 // URL and don't care about all the nitty-gritty details.
 //
 // NOTE(willchan): Only one "IO" thread is supported for URLFetcher.  This is a
@@ skipping 43 matching lines @@
                            bool is_last_chunk) override;
   void SetLoadFlags(int load_flags) override;
   int GetLoadFlags() const override;
   void SetReferrer(const std::string& referrer) override;
   void SetReferrerPolicy(URLRequest::ReferrerPolicy referrer_policy) override;
   void SetExtraRequestHeaders(
       const std::string& extra_request_headers) override;
   void AddExtraRequestHeader(const std::string& header_line) override;
   void SetRequestContext(
       URLRequestContextGetter* request_context_getter) override;
-  void SetInitiatorURL(const GURL& initiator) override;
+  void SetInitiator(const base::Optional<url::Origin>& initiator) override;
   void SetURLRequestUserData(
       const void* key,
       const CreateDataCallback& create_data_callback) override;
   void SetStopOnRedirect(bool stop_on_redirect) override;
   void SetAutomaticallyRetryOn5xx(bool retry) override;
   void SetMaxRetriesOn5xx(int max_retries) override;
   int GetMaxRetriesOn5xx() const override;
   base::TimeDelta GetBackoffDelay() const override;
   void SetAutomaticallyRetryOnNetworkChanges(int max_retries) override;
   void SaveResponseToFileAtPath(
@@ skipping 47 matching lines @@
   static int GetNumFetcherCores();
 
   const scoped_refptr<URLFetcherCore> core_;
 
   DISALLOW_COPY_AND_ASSIGN(URLFetcherImpl);
 };
 
 }  // namespace net
 
 #endif  // NET_URL_REQUEST_URL_FETCHER_IMPL_H_