For prerendering, keep track of all the intermediate redirects, and hook into...

chrome/browser/prerender/prerender_resource_handler.h

 // Copyright (c) 2011 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 CHROME_BROWSER_PRERENDER_PRERENDER_RESOURCE_HANDLER_H_
 #define CHROME_BROWSER_PRERENDER_PRERENDER_RESOURCE_HANDLER_H_
 #pragma once
 
 #include <string>
 
@@ skipping 53 matching lines @@
   virtual bool OnReadCompleted(int request_id, int* bytes_read);
 
   virtual bool OnResponseCompleted(int request_id,
                                    const net::URLRequestStatus& status,
                                    const std::string& security_info);
 
   virtual void OnRequestClosed();
 
  private:
   friend class PrerenderResourceHandlerTest;
-  typedef Callback1<const GURL&>::Type PrerenderCallback;
+  typedef Callback2<const GURL&, const std::vector<GURL>&>::Type
+  PrerenderCallback;

[cbentzel, 2011/01/12 23:49:53]

Nit: indent PrerenderCallback in by 4 spaces [I don't think emacs google-c-style
does this by default]

[tburkard, 2011/01/13 19:14:16]

Done.

 
   static const int kDefaultPrerenderDurationSeconds;
 
   PrerenderResourceHandler(ResourceHandler* next_handler,
                            PrerenderManager* prerender_manager);
   PrerenderResourceHandler(ResourceHandler* next_handler,
                            PrerenderCallback* callback);
   virtual ~PrerenderResourceHandler();
 
-  void RunCallbackFromUIThread(const GURL& url);
-  void StartPrerender(const GURL& url);
+  void RunCallbackFromUIThread(const GURL& url,

[cbentzel, 2011/01/12 23:49:53]

You are going to need to update prerender_resource_handler_unittest to match.

[tburkard, 2011/01/13 19:14:16]

Done.

+                               const std::vector<GURL>& alias_urls);
+  void StartPrerender(const GURL& url,
+                      const std::vector<GURL>& alias_urls);
   void set_prerender_duration(base::TimeDelta prerender_duration);
   void set_get_current_time_function(GetCurrentTimeFunction get_current_time);
 
+  // The set of URLs that are aliases to the URL to be prerendered,
+  // as a result of redirects.
+  std::vector<GURL> alias_urls_;
   GURL url_;
   scoped_refptr<ResourceHandler> next_handler_;
   scoped_refptr<PrerenderManager> prerender_manager_;
   scoped_ptr<PrerenderCallback> prerender_callback_;
   base::TimeDelta prerender_duration_;
   GetCurrentTimeFunction get_current_time_;
 
   DISALLOW_COPY_AND_ASSIGN(PrerenderResourceHandler);
 };
 
 #endif  // CHROME_BROWSER_PRERENDER_PRERENDER_RESOURCE_HANDLER_H_