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

content/public/browser/web_contents_observer.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 CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_OBSERVER_H_
 #define CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_OBSERVER_H_
 
 #include "base/process_util.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/navigation_controller.h"
@@ skipping 30 matching lines @@
       const LoadCommittedDetails& details,
       const FrameNavigateParams& params) {}
   // |render_view_host| is the RenderViewHost for which the provisional load is
   // happening.
   virtual void DidStartProvisionalLoadForFrame(
       int64 frame_id,
       bool is_main_frame,
       const GURL& validated_url,
       bool is_error_page,
       RenderViewHost* render_view_host) {}
-  virtual void ProvisionalChangeToMainFrameUrl(const GURL& url,
-                                               const GURL& opener_url) {}
+  virtual void ProvisionalChangeToMainFrameUrl(
+      const GURL& url,
+      const GURL& opener_url,
+      RenderViewHost* render_view_host) {}
   virtual void DidCommitProvisionalLoadForFrame(
       int64 frame_id,
       bool is_main_frame,
       const GURL& url,
-      PageTransition transition_type) {}
+      PageTransition transition_type,
+      RenderViewHost* render_view_host) {}
   virtual void DidFailProvisionalLoad(int64 frame_id,
                                       bool is_main_frame,
                                       const GURL& validated_url,
                                       int error_code,
-                                      const string16& error_description) {}
+                                      const string16& error_description,
+                                      RenderViewHost* render_view_host) {}
   virtual void DocumentAvailableInMainFrame() {}
   virtual void DocumentLoadedInFrame(int64 frame_id) {}
   virtual void DidFinishLoad(int64 frame_id,
                              const GURL& validated_url,
                              bool is_main_frame) {}
   virtual void DidFailLoad(int64 frame_id,
                            const GURL& validated_url,
                            bool is_main_frame,
                            int error_code,
                            const string16& error_description) {}
@@ skipping 70 matching lines @@
   void WebContentsImplDestroyed();
 
   WebContentsImpl* web_contents_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsObserver);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_OBSERVER_H_