Referrer Policy: Add new policies to URLRequest.

net/url_request/url_request.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.
 
 #include "net/url_request/url_request.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/compiler_specific.h"
@@ skipping 635 matching lines @@
     job_->SetUpload(upload_data_stream_.get());
 
   is_pending_ = true;
   is_redirecting_ = false;
 
   response_info_.was_cached = false;
 
   // If the referrer is secure, but the requested URL is not, the referrer
   // policy should be something non-default. If you hit this, please file a
   // bug.
-  if (referrer_policy_ ==
-          CLEAR_REFERRER_ON_TRANSITION_FROM_SECURE_TO_INSECURE &&
-      GURL(referrer_).SchemeIsSecure() && !url().SchemeIsSecure()) {
+  GURL referrer(referrer_);

[jochen (gone - plz use gerrit), 2014/11/19 10:25:13]

what about moving this to a helper function?

+  bool referrer_policy_requires_secure_referrer_transitions =
+      referrer_policy_ ==
+          CLEAR_REFERRER_ON_TRANSITION_FROM_SECURE_TO_INSECURE ||
+      referrer_policy_ ==
+          REDUCE_REFERRER_GRANULARITY_ON_TRANSITION_CROSS_ORIGIN;
+  bool secure_referrer_in_insecure_request =
+      referrer.SchemeIsSecure() && !url().SchemeIsSecure();
+  bool referrer_is_origin_only = referrer.GetOrigin() == referrer;
+  bool cross_origin_referrer = referrer.GetOrigin() != url().GetOrigin();
+  bool referrer_is_invalid =
+      (referrer_policy_requires_secure_referrer_transitions &&
+       secure_referrer_in_insecure_request) ||
+      (referrer_policy_ ==
+           REDUCE_REFERRER_GRANULARITY_ON_TRANSITION_CROSS_ORIGIN &&
+       cross_origin_referrer && !referrer_is_origin_only);
+
+  if (referrer_is_invalid) {
     if (!network_delegate_ ||
         !network_delegate_->CancelURLRequestWithPolicyViolatingReferrerHeader(
             *this, url(), GURL(referrer_))) {
       referrer_.clear();
     } else {
       // We need to clear the referrer anyway to avoid an infinite recursion
       // when starting the error job.
       referrer_.clear();
       std::string source("delegate");
       net_log_.AddEvent(NetLog::TYPE_CANCELLED,
@@ skipping 560 matching lines @@
       new base::debug::StackTrace(NULL, 0);
   *stack_trace_copy = stack_trace;
   stack_trace_.reset(stack_trace_copy);
 }
 
 const base::debug::StackTrace* URLRequest::stack_trace() const {
   return stack_trace_.get();
 }
 
 }  // namespace net