Move handling of invalid referrer to the network delegate

net/base/network_delegate.cc

Index: net/base/network_delegate.cc
diff --git a/net/base/network_delegate.cc b/net/base/network_delegate.cc
index 76d94abd2df9488d804ac07b9fc83f7745bfe504..1c315ecdc5cab9163b7f91771d19731cbfa402ac 100644
--- a/net/base/network_delegate.cc
+++ b/net/base/network_delegate.cc
@@ -166,6 +166,15 @@ bool NetworkDelegate::CanEnablePrivacyMode(
   return OnCanEnablePrivacyMode(url, first_party_for_cookies);
 }
 
+bool NetworkDelegate::CancelURLRequestWithPolicyViolatingReferrerHeader(
+    const URLRequest& request,
+    const GURL& target_url,
+    const GURL& referrer_url) const {
+  DCHECK(CalledOnValidThread());
+  return OnCancelURLRequestWithPolicyViolatingReferrerHeader(
+      request, target_url, referrer_url);
+}
+
 int NetworkDelegate::OnBeforeURLRequest(URLRequest* request,
                                         const CompletionCallback& callback,
                                         GURL* new_url) {
@@ -269,4 +278,11 @@ int NetworkDelegate::OnBeforeSocketStreamConnect(
   return OK;
 }
 
+bool NetworkDelegate::OnCancelURLRequestWithPolicyViolatingReferrerHeader(
+    const URLRequest& request,
+    const GURL& target_url,
+    const GURL& referrer_url) const {
+  return false;
+}
+
 }  // namespace net