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

chrome/browser/prerender/prerender_manager.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_MANAGER_H_
 #define CHROME_BROWSER_PRERENDER_PRERENDER_MANAGER_H_
 #pragma once
 
 #include <list>
+#include <vector>

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

Should a set be used instead of a vector? It seems like a vector is fine even if
there is a finite redirect loop, but curious about what you think.

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

I don't think it makes a difference..
formally set would do but since it's so small vector might be more efficient.
On 2011/01/12 23:49:53, cbentzel wrote:

[cbentzel, 2011/01/14 02:01:13]

Seems reasonable. 

 
 #include "base/ref_counted.h"
 #include "base/scoped_ptr.h"
 #include "base/threading/non_thread_safe.h"
 #include "base/time.h"
 #include "googleurl/src/gurl.h"
 
 class PrerenderContents;
 class Profile;
 class TabContents;
 
 // PrerenderManager is responsible for initiating and keeping prerendered
 // views of webpages.
 class PrerenderManager : public base::RefCounted<PrerenderManager>,
                          private base::NonThreadSafe {
  public:
   // Owned by a Profile object for the lifetime of the profile.
   explicit PrerenderManager(Profile* profile);
 
-  // Preloads the URL supplied.
-  void AddPreload(const GURL& url);
+  // Preloads the URL supplied.  alias_urls indicates URLs that redirect
+  // to the same URL to be preloaded.
+  void AddPreload(const GURL& url, const std::vector<GURL>& alias_urls);
 
   // For a given TabContents that wants to navigate to the URL supplied,
   // determines whether a preloaded version of the URL can be used,
   // and substitutes the prerendered RVH into the TabContents.  Returns
   // whether or not a prerendered RVH could be used or not.
   bool MaybeUsePreloadedPage(TabContents* tc, const GURL& url);
 
   // Allows PrerenderContents to remove itself when prerendering should
   // be cancelled.  Also deletes the entry.
   void RemoveEntry(PrerenderContents* entry);
@@ skipping 32 matching lines @@
   // Default maximum permitted elements to prerender.
   static const unsigned int kDefaultMaxPrerenderElements = 1;
 
   // Default maximum age a prerendered element may have, in seconds.
   static const int kDefaultMaxPrerenderAgeSeconds = 20;
 
   DISALLOW_COPY_AND_ASSIGN(PrerenderManager);
 };
 
 #endif  // CHROME_BROWSER_PRERENDER_PRERENDER_MANAGER_H_