Enable webview tag in webui

extensions/browser/guest_view/app_view/app_view_guest.h

 // Copyright 2014 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 EXTENSIONS_BROWSER_GUEST_VIEW_APP_VIEW_APP_VIEW_GUEST_H_
 #define EXTENSIONS_BROWSER_GUEST_VIEW_APP_VIEW_APP_VIEW_GUEST_H_
 
 #include "base/id_map.h"
 #include "extensions/browser/extension_function_dispatcher.h"
 #include "extensions/browser/guest_view/app_view/app_view_guest_delegate.h"
@@ skipping 33 matching lines @@
   // content::WebContentsDelegate implementation.
   virtual bool HandleContextMenu(
       const content::ContextMenuParams& params) OVERRIDE;
 
   // GuestViewBase implementation.
   virtual const char* GetAPINamespace() const OVERRIDE;
   virtual int GetTaskPrefix() const OVERRIDE;
   virtual void CreateWebContents(
       const std::string& embedder_extension_id,
       int embedder_render_process_id,
+      const GURL& embedder_site_url,
       const base::DictionaryValue& create_params,
       const WebContentsCreatedCallback& callback) OVERRIDE;
   virtual void DidAttachToEmbedder() OVERRIDE;
   virtual void DidInitialize() OVERRIDE;
 
  private:
   AppViewGuest(content::BrowserContext* browser_context, int guest_instance_id);
 
   virtual ~AppViewGuest();
 
@@ skipping 15 matching lines @@
   // This is used to ensure pending tasks will not fire after this object is
   // destroyed.
   base::WeakPtrFactory<AppViewGuest> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AppViewGuest);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_GUEST_VIEW_APP_VIEW_APP_VIEW_GUEST_H_