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

chrome/browser/net/resource_prefetch_predictor_observer.h

 // 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.
 
 #ifndef CHROME_BROWSER_NET_RESOURCE_PREFETCH_PREDICTOR_OBSERVER_H_
 #define CHROME_BROWSER_NET_RESOURCE_PREFETCH_PREDICTOR_OBSERVER_H_
 
 #include "base/basictypes.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/predictors/resource_prefetch_predictor.h"
 #include "webkit/glue/resource_type.h"
 
 namespace net {
 class URLRequest;
 }
 
+class GURL;
+
 namespace chrome_browser_net {
 
 // Observes resource requests in the ResourceDispatcherHostDelegate and notifies
 // the ResourcePrefetchPredictor about the ones it is interested in.
 //  - Has an instance per profile, and is owned by the corresponding
 //    ProfileIOData.
 //  - Needs to be constructed on UI thread. Rest of the functions can only be
 //    called on the IO thread. Can be destroyed on UI or IO thread.
 class ResourcePrefetchPredictorObserver  {
  public:
   explicit ResourcePrefetchPredictorObserver(
       predictors::ResourcePrefetchPredictor* predictor);
   ~ResourcePrefetchPredictorObserver();
 
   // Parts of the ResourceDispatcherHostDelegate that we want to observe.
   void OnRequestStarted(net::URLRequest* request,
                         ResourceType::Type resource_type,
                         int child_id,
                         int route_id);
-  void OnRequestRedirected(net::URLRequest* request);
+  void OnRequestRedirected(const GURL& redirect_url, net::URLRequest* request);
   void OnResponseStarted(net::URLRequest* request);
 
  private:
   // Owned by profile.
   base::WeakPtr<predictors::ResourcePrefetchPredictor> predictor_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourcePrefetchPredictorObserver);
 };
 
 }  // namespace chrome_browser_net
 
 #endif  // CHROME_BROWSER_NET_RESOURCE_PREFETCH_PREDICTOR_OBSERVER_H_