Speculative resource prefetching - fixing missing navigations due to server side redirects.

chrome/browser/net/resource_prefetch_predictor_observer.cc

 // Copyright (c) 2012 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/net/resource_prefetch_predictor_observer.h"
 
 #include <string>
 
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/resource_request_info.h"
+#include "googleurl/src/gurl.h"
 #include "net/url_request/url_request.h"
 
 using content::BrowserThread;
 using predictors::ResourcePrefetchPredictor;
 
 namespace {
 
 bool SummarizeResponse(net::URLRequest* request,
                        ResourcePrefetchPredictor::URLRequestSummary* summary) {
   const content::ResourceRequestInfo* info =
@@ skipping 61 matching lines @@
 
   BrowserThread::PostTask(
       BrowserThread::UI,
       FROM_HERE,
       base::Bind(&ResourcePrefetchPredictor::RecordURLRequest,
                  predictor_,
                  summary));
 }
 
 void ResourcePrefetchPredictorObserver::OnRequestRedirected(
+    const GURL& redirect_url,
     net::URLRequest* request) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 
   if (!ResourcePrefetchPredictor::ShouldRecordRedirect(request))
     return;
+
   ResourcePrefetchPredictor::URLRequestSummary summary;
   if (!SummarizeResponse(request, &summary))
     return;
 
+  summary.redirect_url = redirect_url;
+
   BrowserThread::PostTask(
       BrowserThread::UI,
       FROM_HERE,
       base::Bind(&ResourcePrefetchPredictor::RecordUrlRedirect,
                  predictor_,
                  summary));
 }
 
 void ResourcePrefetchPredictorObserver::OnResponseStarted(
     net::URLRequest* request) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 
   if (!ResourcePrefetchPredictor::ShouldRecordResponse(request))
     return;
   ResourcePrefetchPredictor::URLRequestSummary summary;
   if (!SummarizeResponse(request, &summary))
     return;
 
   BrowserThread::PostTask(
       BrowserThread::UI,
       FROM_HERE,
       base::Bind(&ResourcePrefetchPredictor::RecordUrlResponse,
                  predictor_,
                  summary));
 }
 
 }  // namespace chrome_browser_net