WIP: Teach "First-Party-Only" cookies about the requestor origin.

net/url_request/url_request.h

Index: net/url_request/url_request.h
diff --git a/net/url_request/url_request.h b/net/url_request/url_request.h
index 4176689a30c1a0ed4b100e8e1d8667366ede5f8f..a28b751afaad0a38c64d1ac47cdf3da63d946f9e 100644
--- a/net/url_request/url_request.h
+++ b/net/url_request/url_request.h
@@ -31,6 +31,7 @@
 #include "net/socket/connection_attempts.h"
 #include "net/url_request/url_request_status.h"
 #include "url/gurl.h"
+#include "url/origin.h"
 
 namespace base {
 class Value;
@@ -275,6 +276,11 @@ class NET_EXPORT URLRequest : NON_EXPORTED_BASE(public base::NonThreadSafe),
   }
   void set_first_party_url_policy(FirstPartyURLPolicy first_party_url_policy);
 
+  // The origin responsible for the request.
+  const url::Origin& requestor_origin() const { return requestor_origin_; }
+  // This method may only be called before Start().
+  void set_requestor_origin(const url::Origin& requestor_origin);
+
   // 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.
@@ -728,6 +734,7 @@ class NET_EXPORT URLRequest : NON_EXPORTED_BASE(public base::NonThreadSafe),
 
   std::vector<GURL> url_chain_;
   GURL first_party_for_cookies_;
+  url::Origin requestor_origin_;
   GURL delegate_redirect_url_;
   std::string method_;  // "GET", "POST", etc. Should be all uppercase.
   std::string referrer_;