Change GuestViewInternalCreateGuestFunction to create the guest view using the

chrome/browser/extensions/api/tabs/tabs_api.cc

 // 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.
 
 #include "chrome/browser/extensions/api/tabs/tabs_api.h"
 
 #include <algorithm>
 #include <limits>
 #include <vector>
 
@@ skipping 972 matching lines @@
     return false;
 
   SetResult(ExtensionTabUtil::CreateTabValue(
       contents, tab_strip, tab_index, extension()));
   return true;
 }
 
 bool TabsGetCurrentFunction::RunSync() {
   DCHECK(dispatcher());
 
-  WebContents* contents = dispatcher()->delegate()->GetAssociatedWebContents();
+  WebContents* contents = dispatcher()->delegate()->GetVisibleWebContents();
   if (contents)
     SetResult(ExtensionTabUtil::CreateTabValue(contents, extension()));
 
   return true;
 }
 
 bool TabsHighlightFunction::RunSync() {
   scoped_ptr<tabs::Highlight::Params> params(
       tabs::Highlight::Params::Create(*args_));
   EXTENSION_FUNCTION_VALIDATE(params.get());
@@ skipping 888 matching lines @@
   ZoomController::ZoomMode zoom_mode = zoom_controller->zoom_mode();
   api::tabs::ZoomSettings zoom_settings;
   ZoomModeToZoomSettings(zoom_mode, &zoom_settings);
 
   results_ = api::tabs::GetZoomSettings::Results::Create(zoom_settings);
   SendResponse(true);
   return true;
 }
 
 }  // namespace extensions