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

chrome/browser/prerender/prerender_contents.h

Index: chrome/browser/prerender/prerender_contents.h
===================================================================
--- chrome/browser/prerender/prerender_contents.h	(revision 71174)
+++ chrome/browser/prerender/prerender_contents.h	(working copy)
@@ -52,6 +52,10 @@
   string16 title() const { return title_; }
   int32 page_id() const { return page_id_; }
 
+  // Indicates whether this prerendered page can be used for the provided
+  // URL, i.e. whether there is a match.
+  bool MatchesUrl(const GURL& url);
+
   // RenderViewHostDelegate implementation.
   virtual RenderViewHostDelegate::View* GetViewDelegate();
   virtual const GURL& GetURL() const;
@@ -133,7 +137,21 @@
                                       const std::string& value);
   virtual void ClearInspectorSettings();
 
+ protected:
+  // from renderViewHostDelegate.
+  virtual bool OnMessageReceived(const IPC::Message& message);
+
  private:
+  // Message handlers.
+  void OnDidStartProvisionalLoadForFrame(int64 frame_id,
+                                         bool main_frame,
+                                         const GURL& url);
+  void OnDidRedirectProvisionalLoad(int32 page_id,
+                                    const GURL& source_url,
+                                    const GURL& target_url);
+
+  void AddMatchingUrl(const GURL& url);
+
   // The prerender manager owning this object.
   PrerenderManager* prerender_manager_;
 
@@ -162,6 +180,11 @@
   GURL url_;
   NotificationRegistrar registrar_;
 
+  // A vector of URLs that this prerendered page matches against.
+  // This array can contain more than element as a result of redirects,
+  // such as HTTP redirects or javascript redirects.
+  std::vector<GURL> matching_urls_;
+
   DISALLOW_COPY_AND_ASSIGN(PrerenderContents);
 };