Add PrerenderStatusEvent on Prerenders

chrome/renderer/prerender/prerender_dispatcher.h

Index: chrome/renderer/prerender/prerender_dispatcher.h
diff --git a/chrome/renderer/prerender/prerender_dispatcher.h b/chrome/renderer/prerender/prerender_dispatcher.h
index c72620dda11c76cf79025596373b6c7f0080d1b7..b1b562e2b2ac83d48634e2b62ca45dddcf66e5c3 100644
--- a/chrome/renderer/prerender/prerender_dispatcher.h
+++ b/chrome/renderer/prerender/prerender_dispatcher.h
@@ -6,6 +6,7 @@
 #define CHROME_RENDERER_PRERENDER_PRERENDER_DISPATCHER_H_
 
 #include <map>
+#include <set>
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
@@ -31,19 +32,25 @@ class PrerenderDispatcher : public content::RenderProcessObserver,
  private:
   friend class PrerenderDispatcherTest;
 
-  void OnAddPrerenderURL(const GURL& url);
-  void OnRemovePrerenderURL(const GURL& url);
+  // Message handlers for messages from the browser process.
+  void OnStartedPrerender(int prerender_id);
+  void OnAddAliasToPrerender(int prerender_id, const GURL& url);
+  void OnStoppedPrerender(int prerender_id);
 
   // From RenderProcessObserver:
   virtual bool OnControlMessageReceived(const IPC::Message& message) OVERRIDE;
 
-  // From WebPrerenderingSupport:
-  virtual void add(const WebKit::WebPrerender& prerender) OVERRIDE;
-  virtual void cancel(const WebKit::WebPrerender& prerender) OVERRIDE;
-  virtual void abandon(const WebKit::WebPrerender& prerender) OVERRIDE;
+  // From WebKit::WebPrerenderingSupport:
+  virtual void add(WebKit::WebPrerender* prerender) OVERRIDE;
+  virtual void cancel(WebKit::WebPrerender* prerender) OVERRIDE;
+  virtual void abandon(WebKit::WebPrerender* prerender) OVERRIDE;
 
-  typedef std::map<GURL, int> PrerenderMap;
-  PrerenderMap prerender_urls_;
+  // From WebKit, prerender elements launched by renderers in our process.
+  std::map<int, WebKit::WebPrerender*> prerenders_;
+
+  // From the browser process, which prerenders have been launched.
+  std::multimap<int, GURL> prerender_aliases_;
+  std::set<int> running_prerenders_;
 };
 
 }  // namespace prerender