Provide observer functions for NOTIFICATION_WEB_CONTENTS_CONNECTED, NOTIFICATION_WEB_CONTENTS_SWAPP…

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/kill.h"
 #include "base/process/process_handle.h"
 #include "content/common/content_export.h"
@@ skipping 45 matching lines @@
   // just swapped out.
   virtual void RenderViewDeleted(RenderViewHost* render_view_host) {}
 
   // This method is invoked when the process for the current RenderView crashes.
   // The WebContents continues to use the RenderViewHost, e.g. when the user
   // reloads the current page.
   // When the RenderViewHost is deleted, the RenderViewDeleted method will be
   // invoked.
   virtual void RenderProcessGone(base::TerminationStatus status) {}
 
+  // This method is invoked when a WebContents swaps its render view host with
+  // another one, possibly changing processes. The RenderViewHost that has
+  // been replaced is in |old_render_view_host|, which is NULL if the old RVH
+  // was shut down.
+  virtual void RenderViewHostSwapped(RenderViewHost* old_render_view_host) {}
+
   // This method is invoked after the WebContents decided which RenderViewHost
   // to use for the next navigation, but before the navigation starts.
   virtual void AboutToNavigateRenderView(
       RenderViewHost* render_view_host) {}
 
   // This method is invoked right after the navigation was initiated.
   virtual void NavigateToPendingEntry(
       const GURL& url,
       NavigationController::ReloadType reload_type) {}
 
@@ skipping 221 matching lines @@
   void WebContentsImplDestroyed();
 
   WebContentsImpl* web_contents_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsObserver);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_OBSERVER_H_