keyboard: Update the visibility after tab-switch.

chrome/browser/tab_contents/tab_contents.cc

 // Copyright (c) 2011 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/tab_contents/tab_contents.h"
 
 #include <cmath>
 
 #include "base/auto_reset.h"
 #include "base/metrics/histogram.h"
@@ skipping 3123 matching lines @@
   return delegate()->IsExternalTabContainer();
 }
 
 void TabContents::DidInsertCSS() {
   // This RVHDelegate function is used for extensions and not us.
 }
 
 void TabContents::FocusedNodeChanged(bool is_editable_node) {
   NotificationService::current()->Notify(
       NotificationType::FOCUS_CHANGED_IN_PAGE,
-      Source<RenderViewHost>(render_view_host()),
+      Source<TabContents>(this),
       Details<const bool>(&is_editable_node));
 }
 
 void TabContents::UpdateZoomLimits(int minimum_percent,
                                    int maximum_percent,
                                    bool remember) {
   minimum_zoom_percent_ = minimum_percent;
   maximum_zoom_percent_ = maximum_percent;
   temporary_zoom_settings_ = !remember;
 }
@@ skipping 240 matching lines @@
   if (pm != NULL) {
     if (pm->MaybeUsePreloadedPage(this, url)) {
       // TODO(tburkard): If the preloaded page has not finished preloading
       // yet, we should not do this.
       DidStopLoading();
       return true;
     }
   }
   return false;
 }