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

chrome/browser/prerender/prerender_resource_handler.cc

 // 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.
 
 #include "chrome/browser/prerender/prerender_resource_handler.h"
 
 #include "chrome/browser/net/chrome_url_request_context.h"
 #include "chrome/common/resource_response.h"
 #include "net/base/load_flags.h"
 #include "net/http/http_response_headers.h"
@@ skipping 82 matching lines @@
                                                 uint64 size) {
   return next_handler_->OnUploadProgress(request_id, position, size);
 }
 
 bool PrerenderResourceHandler::OnRequestRedirected(int request_id,
                                                    const GURL& url,
                                                    ResourceResponse* response,
                                                    bool* defer) {
   bool will_redirect = next_handler_->OnRequestRedirected(
       request_id, url, response, defer);
-  if (will_redirect)
+  if (will_redirect) {
+    alias_urls_.push_back(url);
     url_ = url;
+  }
   return will_redirect;
 }
 
 bool PrerenderResourceHandler::OnResponseStarted(int request_id,
                                                  ResourceResponse* response) {
   if (ShouldPrerender(url_,
                       response,
                       get_current_time_,
                       prerender_duration_)) {
     BrowserThread::PostTask(
         BrowserThread::UI,
         FROM_HERE,
         NewRunnableMethod(
             this,
             &PrerenderResourceHandler::RunCallbackFromUIThread,
-            url_));
+            url_,
+            alias_urls_));
   }
   return next_handler_->OnResponseStarted(request_id, response);
 }
 
 bool PrerenderResourceHandler::OnWillStart(int request_id,
                                            const GURL& url,
                                            bool* defer) {
   bool will_start = next_handler_->OnWillStart(request_id, url, defer);
-  if (will_start)
+  if (will_start) {
+    alias_urls_.push_back(url);
     url_ = url;
+  }
   return will_start;
 }
 
 bool PrerenderResourceHandler::OnWillRead(int request_id,
                                           net::IOBuffer** buf,
                                           int* buf_size,
                                           int min_size) {
   return next_handler_->OnWillRead(request_id, buf, buf_size, min_size);
 }
 
 bool PrerenderResourceHandler::OnReadCompleted(int request_id,
                                                int* bytes_read) {
   return next_handler_->OnReadCompleted(request_id, bytes_read);
 }
 
 bool PrerenderResourceHandler::OnResponseCompleted(
     int request_id,
     const net::URLRequestStatus& status,
     const std::string& security_info) {
   return next_handler_->OnResponseCompleted(request_id, status, security_info);
 }
 
 void PrerenderResourceHandler::OnRequestClosed() {
   next_handler_->OnRequestClosed();
 }
 
-void PrerenderResourceHandler::RunCallbackFromUIThread(const GURL& url) {
+void PrerenderResourceHandler::RunCallbackFromUIThread(const GURL& url,
+                                                       const std::vector<GURL>&
+                                                       alias_urls) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  prerender_callback_->Run(url);
+  prerender_callback_->Run(url, alias_urls);
 }
 
-void PrerenderResourceHandler::StartPrerender(const GURL& url) {
+void PrerenderResourceHandler::StartPrerender(const GURL& url,
+                                              const std::vector<GURL>&
+                                              alias_urls) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  prerender_manager_->AddPreload(url);
+  prerender_manager_->AddPreload(url, alias_urls);

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

It looks like url is going to be part of alias_urls. Is this intended? 

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

Yes, that's fine.  Doesn't harm to have it in there one extra time.
On 2011/01/12 23:49:53, cbentzel wrote:

 }
 
 void PrerenderResourceHandler::set_prerender_duration(base::TimeDelta dt) {
   prerender_duration_ = dt;
 }
 
 void PrerenderResourceHandler::set_get_current_time_function(
     GetCurrentTimeFunction get_current_time) {
   DCHECK(get_current_time);
   get_current_time_ = get_current_time;
 }
 
 // Note: this should stay in line with prerendermanager
 // static
 const int PrerenderResourceHandler::kDefaultPrerenderDurationSeconds = 20;