New link rel=prerender api, using WebKit::WebPrerenderingPlatform

chrome/browser/prerender/prerender_contents.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_PRERENDER_PRERENDER_CONTENTS_H_
 #define CHROME_BROWSER_PRERENDER_PRERENDER_CONTENTS_H_
 #pragma once
 
 #include <list>
 #include <string>
+#include <utility>
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/time.h"
 #include "base/values.h"
 #include "chrome/browser/prerender/prerender_final_status.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/common/referrer.h"
+#include "ui/gfx/size.h"
 
 class Profile;
 class TabContentsWrapper;
 struct FaviconURL;
 
 namespace base {
 class ProcessMetrics;
 }
 
 namespace content {
@@ skipping 28 matching lines @@
         const GURL& url,
         const content::Referrer& referrer,
         Origin origin,
         uint8 experiment_id) = 0;
 
    private:
     DISALLOW_COPY_AND_ASSIGN(Factory);
   };
 
   // Information on pages that the prerendered page has tried to prerender.
-  struct PendingPrerenderData {
-    PendingPrerenderData(Origin origin,
-                         const GURL& url,
-                         const content::Referrer& referrer);
-
-    Origin origin;
-    GURL url;
-    content::Referrer referrer;
-  };
+  typedef std::pair<GURL, content::Referrer> PendingPrerenderData;

[mmenke, 2012/04/30 18:35:22]

nit:  Now that we have a "PrerenderExtraData", I suggest renaming this to
"PrendingPrerenderInfo", just to make the names a little more distinct.

[gavinp, 2012/04/30 23:55:39]

Done, but spelled right.

[mmenke, 2012/05/01 16:23:21]

I'm not going to sign off on this until you duplicate my typo, dangit.

   typedef std::list<PendingPrerenderData> PendingPrerenderList;
 
   // Indicates how this PrerenderContents relates to MatchComplete.
   // This is important to figure out in what histograms to record the
   // FinalStatus in, as described below.
   enum MatchCompleteStatus {
     // A regular prerender which will be recorded both in Match and
     // MatchComplete.
     MATCH_COMPLETE_DEFAULT,
     // A prerender that used to be a regular prerender, but has since
     // been replaced by a MatchComplete dummy.  Therefore, we will record
     // this only for Match, but not for MatchComplete.
     MATCH_COMPLETE_REPLACED,
     // A prerender that is a MatchComplete dummy replacing a regular
     // prerender.  Therefore, we will record this only for MatchComplete,
     // but not Match.
     MATCH_COMPLETE_REPLACEMENT
   };
 
   virtual ~PrerenderContents();
 
   bool Init();
 
   static Factory* CreateFactory();
 
   // |source_render_view_host| is the RenderViewHost that initiated
   // prerendering.
   virtual void StartPrerendering(
-      const content::RenderViewHost* source_render_view_host,
+      int creator_child_id,
+      const gfx::Size& size,
       content::SessionStorageNamespace* session_storage_namespace);
 
   // Verifies that the prerendering is not using too many resources, and kills
   // it if not.
   void DestroyWhenUsingTooManyResources();
 
-  content::RenderViewHost* render_view_host_mutable();
-  const content::RenderViewHost* render_view_host() const;
+  content::RenderViewHost* GetRenderViewHostMutable();
+  const content::RenderViewHost* GetRenderViewHost() const;
+
   string16 title() const { return title_; }
   int32 page_id() const { return page_id_; }
   GURL icon_url() const { return icon_url_; }
   const GURL& prerender_url() const { return prerender_url_; }
   const content::Referrer& referrer() const { return referrer_; }
   bool has_stopped_loading() const { return has_stopped_loading_; }
   bool has_finished_loading() const { return has_finished_loading_; }
   bool prerendering_has_started() const { return prerendering_has_started_; }
   MatchCompleteStatus match_complete_status() const {
     return match_complete_status_;
@@ skipping 17 matching lines @@
   FinalStatus final_status() const { return final_status_; }
 
   Origin origin() const { return origin_; }
   uint8 experiment_id() const { return experiment_id_; }
 
   base::TimeTicks load_start_time() const { return load_start_time_; }
 
   // Indicates whether this prerendered page can be used for the provided
   // URL, i.e. whether there is a match. |matching_url| is optional and will be
   // set to the URL that is found as a match if it is provided.
+  // TODO(gavinp,mmenke): Rework matching to be based on both the URL
+  // and the session WebStorage.
   bool MatchesURL(const GURL& url, GURL* matching_url) const;
 
   void OnJSOutOfMemory();
   bool ShouldSuppressDialogs();
 
   // content::WebContentsObserver implementation.
   virtual void DidStopLoading() OVERRIDE;
   virtual void DidStartProvisionalLoadForFrame(
       int64 frame_id,
       bool is_main_frame,
@@ skipping 36 matching lines @@
   void CommitHistory(TabContentsWrapper* tab);
 
   base::Value* GetAsValue() const;
 
   // Returns whether a pending cross-site navigation is happening.
   // This could happen with renderer-issued navigations, such as a
   // MouseEvent being dispatched by a link to a website installed as an app.
   bool IsCrossSiteNavigationPending() const;
 
   // Adds a pending prerender to the list.
-  virtual void AddPendingPrerender(Origin origin,
-                                   const GURL& url,
+  virtual void AddPendingPrerender(const GURL& url,
                                    const content::Referrer& referrer);
 
   // Returns true if |url| corresponds to a pending prerender.
   bool IsPendingEntry(const GURL& url) const;
 
   // Reissues any pending prerender requests from the prerendered page.  Also
   // clears the list of pending requests.
   void StartPendingPrerenders();
 
  protected:
@@ skipping 11 matching lines @@
       content::RenderViewHost* new_render_view_host);
 
   content::NotificationRegistrar& notification_registrar() {
     return notification_registrar_;
   }
 
   const PendingPrerenderList* pending_prerender_list() const {
     return &pending_prerender_list_;
   }
 
+  bool prerendering_has_been_cancelled() const {
+    return prerendering_has_been_cancelled_;
+  }
+
   virtual content::WebContents* CreateWebContents(
       content::SessionStorageNamespace* session_storage_namespace);
 
  private:
   class TabContentsDelegateImpl;
 
   // Needs to be able to call the constructor.
   friend class PrerenderContentsFactoryImpl;
 
   friend class PrerenderRenderViewHostObserver;
@@ skipping 83 matching lines @@
 
   // Experiment during which this prerender is performed.
   uint8 experiment_id_;
 
   // List of all pages the prerendered page has tried to prerender.
   PendingPrerenderList pending_prerender_list_;
 
   // The process that created the child id.
   int creator_child_id_;
 
+  // The size of the WebView from the launching page.
+  gfx::Size size_;
+
   DISALLOW_COPY_AND_ASSIGN(PrerenderContents);
 };
 
 }  // namespace prerender
 
 #endif  // CHROME_BROWSER_PRERENDER_PRERENDER_CONTENTS_H_