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

content/browser/loader/resource_dispatcher_host_impl.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.
 
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
 
 #include "content/browser/loader/resource_dispatcher_host_impl.h"
 
 #include <stddef.h>
 #include <algorithm>
@@ skipping 1313 matching lines @@
     return;
   }
 
   // Construct the request.
   scoped_ptr<net::URLRequest> new_request = request_context->CreateRequest(
       request_data.url, request_data.priority, NULL);
 
   new_request->set_method(request_data.method);
   new_request->set_first_party_for_cookies(
       request_data.first_party_for_cookies);
+  new_request->set_initiator(request_data.request_initiator);
 
   // If the request is a MAIN_FRAME request, the first-party URL gets updated on
   // redirects.
   if (request_data.resource_type == RESOURCE_TYPE_MAIN_FRAME) {
     new_request->set_first_party_url_policy(
         net::URLRequest::UPDATE_FIRST_PARTY_URL_ON_REDIRECT);
   }
 
   const Referrer referrer(request_data.referrer, request_data.referrer_policy);
   SetReferrerForRequest(new_request.get(), referrer);
@@ skipping 768 matching lines @@
   // requests that have the ignore limits flag set.
   DCHECK(!(load_flags & net::LOAD_IGNORE_LIMITS));
 
   scoped_ptr<net::URLRequest> new_request;
   new_request = request_context->CreateRequest(
       info.common_params.url, net::HIGHEST, nullptr);
 
   new_request->set_method(info.begin_params.method);
   new_request->set_first_party_for_cookies(
       info.first_party_for_cookies);
+  new_request->set_initiator(info.request_initiator);
   if (info.is_main_frame) {
     new_request->set_first_party_url_policy(
         net::URLRequest::UPDATE_FIRST_PARTY_URL_ON_REDIRECT);
   }
 
   SetReferrerForRequest(new_request.get(), info.common_params.referrer);
 
   net::HttpRequestHeaders headers;
   headers.AddHeadersFromString(info.begin_params.headers);
   new_request->SetExtraRequestHeaders(headers);
@@ skipping 417 matching lines @@
     load_flags |= net::LOAD_PREFETCH;
   }
 
   if (is_sync_load)
     load_flags |= net::LOAD_IGNORE_LIMITS;
 
   return load_flags;
 }
 
 }  // namespace content