Propagate the "first party for cookies" from WebKit through the resource...

net/url_request/url_request.h

 // Copyright (c) 2006-2009 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_REQUEST_H_
 #define NET_URL_REQUEST_URL_REQUEST_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 240 matching lines @@
   // The original url is the url used to initialize the request, and it may
   // differ from the url if the request was redirected.
   const GURL& original_url() const { return original_url_; }
   const GURL& url() const { return url_; }
 
   // The URL that should be consulted for the third-party cookie blocking
   // policy.
   const GURL& first_party_for_cookies() const {
       return first_party_for_cookies_;
   }
+  // This method may be called before Start() or FollowDeferredRedirect() is
+  // called.
   void set_first_party_for_cookies(const GURL& first_party_for_cookies);
 
   // The request method, as an uppercase string.  "GET" is the default value.
   // The request method may only be changed before Start() is called and
   // should only be assigned an uppercase value.
   const std::string& method() const { return method_; }
   void set_method(const std::string& method);
 
   // The referrer URL for the request.  This header may actually be suppressed
   // from the underlying network request for security reasons (e.g., a HTTPS
@@ skipping 337 matching lines @@
   // this to determine which URLRequest to allocate sockets to first.
   int priority_;
 
   RequestTracker<URLRequest>::Node request_tracker_node_;
   base::LeakTracker<URLRequest> leak_tracker_;
 
   DISALLOW_COPY_AND_ASSIGN(URLRequest);
 };
 
 #endif  // NET_URL_REQUEST_URL_REQUEST_H_