Provide observer functions for NOTIFICATION_WEB_CONTENTS_CONNECTED, NOTIFICATION_WEB_CONTENTS_SWAPP…

content/public/browser/web_contents_observer.h

Index: content/public/browser/web_contents_observer.h
diff --git a/content/public/browser/web_contents_observer.h b/content/public/browser/web_contents_observer.h
index d46f3152968ece8a631fbf7250443e37f7857a12..8593faa729b889d9963dfb5e4b184c7f231e93ca 100644
--- a/content/public/browser/web_contents_observer.h
+++ b/content/public/browser/web_contents_observer.h
@@ -63,6 +63,12 @@ class CONTENT_EXPORT WebContentsObserver : public IPC::Listener,
   // 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(