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

chrome/browser/prerender/prerender_tab_helper.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_TAB_HELPER_H_
 #define CHROME_BROWSER_PRERENDER_PRERENDER_TAB_HELPER_H_
 
 #include "base/time.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "googleurl/src/gurl.h"
 
 class TabContentsWrapper;
 
 namespace prerender {
 
 class PrerenderManager;
 
 // PrerenderTabHelper is responsible for recording perceived pageload times
 // to compare PLT's with prerendering enabled and disabled.
 class PrerenderTabHelper : public content::WebContentsObserver {
  public:
   explicit PrerenderTabHelper(TabContentsWrapper* tab);
   virtual ~PrerenderTabHelper();
 
   // content::WebContentsObserver implementation.
   virtual void ProvisionalChangeToMainFrameUrl(
       const GURL& url,
-      const GURL& opener_url) OVERRIDE;
+      const GURL& opener_url,
+      content::RenderViewHost* render_view_host) OVERRIDE;
   virtual void DidStopLoading() OVERRIDE;
   virtual void DidStartProvisionalLoadForFrame(
       int64 frame_id,
       bool is_main_frame,
       const GURL& validated_url,
       bool is_error_page,
       content::RenderViewHost* render_view_host) OVERRIDE;
   virtual void DidCommitProvisionalLoadForFrame(
       int64 frame_id,
       bool is_main_frame,
       const GURL& validated_url,
-      content::PageTransition transition_type) OVERRIDE;
+      content::PageTransition transition_type,
+      content::RenderViewHost* render_view_host) OVERRIDE;
   // Called when this prerendered TabContents has just been swapped in.
   void PrerenderSwappedIn();
 
  private:
   // Helper class to compute pixel-based stats on the paint progress
   // between when a prerendered page is swapped in and when the onload event
   // fires.
   class PixelStats;
   scoped_ptr<PixelStats> pixel_stats_;
 
@@ skipping 22 matching lines @@
 
   // Current URL being loaded.
   GURL url_;
 
   DISALLOW_COPY_AND_ASSIGN(PrerenderTabHelper);
 };
 
 }  // namespace prerender
 
 #endif  // CHROME_BROWSER_PRERENDER_PRERENDER_TAB_HELPER_H_