Add WebDataSource::appendRedirect for cross-process redirects.

public/web/WebDataSource.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 50 matching lines @@
     virtual const WebURLRequest& request() const = 0;
 
     // Returns the response associated with this datasource.
     virtual const WebURLResponse& response() const = 0;
 
     // When this datasource was created as a result of WebFrame::loadData,
     // there may be an associated unreachableURL.
     virtual bool hasUnreachableURL() const = 0;
     virtual WebURL unreachableURL() const = 0;
 
+    // Allows the embedder to append redirects to the chain as a navigation
+    // is starting, in case it is being transferred from another process.
+    virtual void appendRedirect(const WebURL&) = 0;
+
     // Returns all redirects that occurred (both client and server) before
     // at last committing the current page.  This will contain one entry
     // for each intermediate URL, and one entry for the last URL (so if
     // there are no redirects, it will contain exactly the current URL, and
     // if there is one redirect, it will contain the source and destination
     // URL).
     virtual void redirectChain(WebVector<WebURL>&) const = 0;
 
     // Returns whether the navigation associated with this datasource is a
     // client redirect.
@@ skipping 32 matching lines @@
     // the user may have already recorded the original value.
     virtual void setNavigationStartTime(double) = 0;
 
 protected:
     ~WebDataSource() { }
 };
 
 } // namespace WebKit
 
 #endif