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

content/child/request_info.h

Index: content/child/request_info.h
diff --git a/content/child/request_info.h b/content/child/request_info.h
index feb34375fab8993baca32862cc165b6d996dc1b5..80f8a09f061fa275cc85619976f89f5b9b2e3694 100644
--- a/content/child/request_info.h
+++ b/content/child/request_info.h
@@ -19,6 +19,7 @@
 #include "third_party/WebKit/public/platform/WebReferrerPolicy.h"
 #include "third_party/WebKit/public/platform/WebURLRequest.h"
 #include "url/gurl.h"
+#include "url/origin.h"
 
 namespace content {
 
@@ -37,6 +38,10 @@ struct CONTENT_EXPORT RequestInfo {
   // third-party cookie blocking policy.
   GURL first_party_for_cookies;
 
+  // The origin responsible for the request, which will be checked by the
+  // first-party-only cookie policy.
+  url::Origin requestor_origin;
+
   // Optional parameter, the referrer to use for the request for the url member.
   Referrer referrer;