Add PrerenderStatusEvent on Prerenders

chrome/renderer/prerender/prerender_dispatcher.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_RENDERER_PRERENDER_PRERENDER_DISPATCHER_H_
 #define CHROME_RENDERER_PRERENDER_PRERENDER_DISPATCHER_H_
 
 #include <map>
+#include <set>
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/public/renderer/render_process_observer.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebPrerenderingSupport.h"
 
 class GURL;
 
 namespace prerender {
 
 // There is one PrerenderDispatcher per render process. It keeps track of which
 // prerenders were launched from this renderer, and ensures prerender navigation
 // is triggered on navigation to those. It implements the prerendering interface
 // supplied to WebKit.
 class PrerenderDispatcher : public content::RenderProcessObserver,
                             public WebKit::WebPrerenderingSupport {
  public:
   PrerenderDispatcher();
   virtual ~PrerenderDispatcher();
 
   bool IsPrerenderURL(const GURL& url) const;
 
  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
 
 #endif  // CHROME_RENDERER_PRERENDER_PRERENDER_DISPATCHER_H_