Pass the render view host with all provisional load related callbacks on the web contents observer

chrome/browser/prerender/prerender_tab_helper.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_tab_helper.h"
 
 #include "base/metrics/histogram.h"
 #include "base/string_number_conversions.h"
 #include "base/time.h"
 #include "chrome/browser/prerender/prerender_histograms.h"
@@ skipping 138 matching lines @@
     : content::WebContentsObserver(tab->web_contents()),
       pixel_stats_(new PixelStats(this)),
       tab_(tab) {
 }
 
 PrerenderTabHelper::~PrerenderTabHelper() {
 }
 
 void PrerenderTabHelper::ProvisionalChangeToMainFrameUrl(
     const GURL& url,
-    const GURL& opener_url) {
+    const GURL& opener_url,
+    content::RenderViewHost* render_view_host) {
   url_ = url;
   RecordPageviewEvent(PAGEVIEW_EVENT_NEW_URL);
   if (IsTopSite(url))
     RecordPageviewEvent(PAGEVIEW_EVENT_TOP_SITE_NEW_URL);
   PrerenderManager* prerender_manager = MaybeGetPrerenderManager();
   if (!prerender_manager)
     return;
   if (prerender_manager->IsWebContentsPrerendering(web_contents()))
     return;
   prerender_manager->MarkWebContentsAsNotPrerendered(web_contents());
 }
 
 void PrerenderTabHelper::DidCommitProvisionalLoadForFrame(
     int64 frame_id,
     bool is_main_frame,
     const GURL& validated_url,
-    content::PageTransition transition_type) {
+    content::PageTransition transition_type,
+    content::RenderViewHost* render_view_host) {
   if (!is_main_frame)
     return;
   PrerenderManager* prerender_manager = MaybeGetPrerenderManager();
   if (!prerender_manager)
     return;
   if (prerender_manager->IsWebContentsPrerendering(web_contents()))
     return;
   prerender_manager->RecordNavigation(validated_url);
 }
 
@@ skipping 82 matching lines @@
     pixel_stats_->GetBitmap(PixelStats::BITMAP_SWAP_IN, web_contents());
   }
 }
 
 bool PrerenderTabHelper::IsTopSite(const GURL& url) {
   PrerenderManager* pm = MaybeGetPrerenderManager();
   return (pm && pm->IsTopSite(url));
 }
 
 }  // namespace prerender