Prerendered pages are swapped in at browser::Navigate time.

chrome/browser/prerender/prerender_manager.cc

 // 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.
 
 #include "chrome/browser/prerender/prerender_manager.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 17 matching lines @@
 #include "chrome/browser/prerender/prerender_manager_factory.h"
 #include "chrome/browser/prerender/prerender_tab_helper.h"
 #include "chrome/browser/prerender/prerender_tracker.h"
 #include "chrome/browser/prerender/prerender_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/tab_contents/core_tab_helper.h"
 #include "chrome/browser/ui/tab_contents/core_tab_helper_delegate.h"
 #include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/chrome_switches.h"
-#include "chrome/common/render_messages.h"
+#include "chrome/common/prerender_messages.h"
 #include "content/browser/in_process_webkit/session_storage_namespace.h"
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/devtools_agent_host_registry.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/notification_source.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/web_contents.h"
@@ skipping 260 matching lines @@
   DCHECK(CalledOnValidThread());
   for (PrerenderContentsDataList::iterator it = prerender_list_.begin();
        it != prerender_list_.end(); ) {
     PrerenderContentsDataList::iterator cur = it++;
     if (cur->contents_->origin() == ORIGIN_OMNIBOX)
       cur->contents_->Destroy(FINAL_STATUS_CANCELLED);
   }
 }
 
 bool PrerenderManager::MaybeUsePrerenderedPage(WebContents* web_contents,
-                                               const GURL& url,
-                                               const GURL& opener_url) {
+                                               const GURL& url) {
   DCHECK(CalledOnValidThread());
+  DCHECK(web_contents);
+  DCHECK(!IsWebContentsPrerendering(web_contents));
   RecordNavigation(url);
 
   scoped_ptr<PrerenderContents> prerender_contents(
       GetEntryButNotSpecifiedWC(url, web_contents));
   if (prerender_contents.get() == NULL)
     return false;
 
   // Do not use the prerendered version if the opener url corresponding to the
   // window.opener property has the same origin as the url.
   // NOTE: This is broken in the cases where the document domain is modified
   // using the javascript property for "document.domain".
-  if (opener_url.GetOrigin() == url.GetOrigin()) {
+  // TODO(cbentzel): I think the document.domain case is fixed now.
+  if (web_contents->GetOpenerOrigin() == url.GetOrigin()) {
     prerender_contents.release()->Destroy(FINAL_STATUS_WINDOW_OPENER);
     return false;
   }
 
   // Even if we match, the location.hash might be different. Record this as a
   // separate final status.
   GURL matching_url;
   bool url_matches = prerender_contents->MatchesURL(url, &matching_url);
   DCHECK(url_matches);
   if (url_matches && url.ref() != matching_url.ref()) {
@@ skipping 65 matching lines @@
     histograms_->RecordTimeUntilUsed(GetCurrentTimeTicks() -
                                      prerender_contents->load_start_time(),
                                      config_.max_age);
   }
 
   histograms_->RecordPerSessionCount(++prerenders_per_session_count_);
   histograms_->RecordUsedPrerender(prerender_contents->origin());
   prerender_contents->set_final_status(FINAL_STATUS_USED);
 
   new_render_view_host->Send(
-      new ChromeViewMsg_SetIsPrerendering(new_render_view_host->routing_id(),
+      new PrerenderMsg_SetIsPrerendering(new_render_view_host->routing_id(),
                                           false));

[dominich, 2012/02/29 19:44:35]

nit: indent is off by one.

 
   TabContentsWrapper* new_tab_contents =
       prerender_contents->ReleasePrerenderContents();
   TabContentsWrapper* old_tab_contents =
       TabContentsWrapper::GetCurrentWrapperForContents(web_contents);
   DCHECK(new_tab_contents);
   DCHECK(old_tab_contents);
 
   MarkWebContentsAsPrerendered(new_tab_contents->web_contents());
 
@@ skipping 745 matching lines @@
   if (!render_process_host || !render_process_host->GetBrowserContext())
     return NULL;
   Profile* profile = Profile::FromBrowserContext(
       render_process_host->GetBrowserContext());
   if (!profile)
     return NULL;
   return PrerenderManagerFactory::GetInstance()->GetForProfile(profile);
 }
 
 }  // namespace prerender