Teach URLRequest about initiator checks for First-Party-Only cookies.

net/url_request/url_fetcher.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.
 
 #ifndef NET_URL_REQUEST_URL_FETCHER_H_
 #define NET_URL_REQUEST_URL_FETCHER_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 189 matching lines @@
   // Add header (with format field-name ":" [ field-value ]) to the request
   // headers.  Must be called before the request is started.
   // This appends the header to the current extra request headers.
   virtual void AddExtraRequestHeader(const std::string& header_line) = 0;
 
   // Set the URLRequestContext on the request.  Must be called before the
   // request is started.
   virtual void SetRequestContext(
       URLRequestContextGetter* request_context_getter) = 0;
 
-  // Set the URL that should be consulted for the third-party cookie
-  // blocking policy.
-  virtual void SetFirstPartyForCookies(
-      const GURL& first_party_for_cookies) = 0;
+  // Set the URL that should be considered as "initiating" the fetch. This URL
+  // will be considered the "first-party" when applying cookie blocking policy
+  // to requests, and treated as the request's initiator.
+  //
+  // TODO(mkwst): Convert this to take a 'url::Origin': https://crbug.com/577565
+  virtual void SetInitiatorURL(const GURL& initiator) = 0;
 
   // Set the key and data callback that is used when setting the user
   // data on any URLRequest objects this object creates.
   virtual void SetURLRequestUserData(
       const void* key,
       const CreateDataCallback& create_data_callback) = 0;
 
   // If |stop_on_redirect| is true, 3xx responses will cause the fetch to halt
   // immediately rather than continue through the redirect.  OnURLFetchComplete
   // will be called, with the URLFetcher's URL set to the redirect destination,
@@ skipping 105 matching lines @@
   // be removed once the URLFetcher is destroyed.  User should not take
   // ownership more than once, or call this method after taking ownership.
   virtual bool GetResponseAsFilePath(
       bool take_ownership,
       base::FilePath* out_response_path) const = 0;
 };
 
 }  // namespace net
 
 #endif  // NET_URL_REQUEST_URL_FETCHER_H_