Implement new referrer policies

net/url_request/url_request.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_REQUEST_H_
 #define NET_URL_REQUEST_URL_REQUEST_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 87 matching lines @@
     // stripped down to an origin rather than a full URL). Same-origin
     // requests will send the full referrer.
     REDUCE_REFERRER_GRANULARITY_ON_TRANSITION_CROSS_ORIGIN,
     // Strip the referrer down to an origin upon cross-origin navigation.
     ORIGIN_ONLY_ON_TRANSITION_CROSS_ORIGIN,
     // Never change the referrer.
     NEVER_CLEAR_REFERRER,
     // Strip the referrer down to the origin regardless of the redirect
     // location.
     ORIGIN,
+    // Clear the referrer on cross-origin redirect locations.
+    CLEAR_REFERRER_ON_TRANSITION_CROSS_ORIGIN,
+    // Strip the referrer down to the origin, but clear it entirely if the
+    // protocol changes from HTTPS to HTTP.
+    ORIGIN_CLEAR_ON_TRANSITION_FROM_SECURE_TO_INSECURE,
     // Always clear the referrer regardless of the redirect location.
     NO_REFERRER,
     MAX_REFERRER_POLICY
   };
 
   // First-party URL redirect policy: During server redirects, the first-party
   // URL for cookies normally doesn't change. However, if the request is a
   // top-level first-party request, the first-party URL should be updated to the
   // URL on every redirect.
   enum FirstPartyURLPolicy {
@@ skipping 744 matching lines @@
   const NetworkTrafficAnnotationTag traffic_annotation_;
 
   THREAD_CHECKER(thread_checker_);
 
   DISALLOW_COPY_AND_ASSIGN(URLRequest);
 };
 
 }  // namespace net
 
 #endif  // NET_URL_REQUEST_URL_REQUEST_H_