Move handling of invalid referrer to the network delegate

net/base/network_delegate.h

Index: net/base/network_delegate.h
diff --git a/net/base/network_delegate.h b/net/base/network_delegate.h
index a290d16604eef86fe0c14f3162e37ee8a12c8a72..147c0d68c7841531cc41cc6ab20696d723ffa2f7 100644
--- a/net/base/network_delegate.h
+++ b/net/base/network_delegate.h
@@ -108,6 +108,10 @@ class NET_EXPORT NetworkDelegate : public base::NonThreadSafe {
   int NotifyBeforeSocketStreamConnect(SocketStream* socket,
                                       const CompletionCallback& callback);
 
+  bool CanCorrectInvalidReferrerHeader(const URLRequest& request,
+                                       const GURL& target_url,
+                                       const GURL& referrer_url) const;
+
  private:
   // This is the interface for subclasses of NetworkDelegate to implement. These
   // member functions will be called by the respective public notification
@@ -270,6 +274,16 @@ class NET_EXPORT NetworkDelegate : public base::NonThreadSafe {
   // See OnBeforeURLRequest for return value description. Returns OK by default.
   virtual int OnBeforeSocketStreamConnect(
       SocketStream* socket, const CompletionCallback& callback);
+
+  // Called when the |referrer_url| for requesting |target_url| during handling
+  // of the |request| is invalid (e.g. a secure referrer for an insecure
+  // target).
+  // Returns true if the referrer header should be omitted, or false if the
+  // request should be cancelled.
+  virtual bool OnCanCorrectInvalidReferrerHeader(
+      const URLRequest& request,
+      const GURL& target_url,
+      const GURL& referrer_url) const;
 };
 
 }  // namespace net