Enable webview tag in webui

extensions/browser/guest_view/guest_view_base.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_GUEST_VIEW_BASE_H_
 #define EXTENSIONS_BROWSER_GUEST_VIEW_GUEST_VIEW_BASE_H_
 
 #include <queue>
 
 #include "base/memory/weak_ptr.h"
@@ skipping 142 matching lines @@
   virtual int GetTaskPrefix() const = 0;
 
   // This method is to be implemented by the derived class. Given a set of
   // initialization parameters, a concrete subclass of GuestViewBase can
   // create a specialized WebContents that it returns back to GuestViewBase.
   typedef base::Callback<void(content::WebContents*)>
       WebContentsCreatedCallback;
   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) = 0;
 
   // This creates a WebContents and initializes |this| GuestViewBase to use the
   // newly created WebContents.
   void Init(const std::string& embedder_extension_id,
             content::WebContents* embedder_web_contents,
             const base::DictionaryValue& create_params,
             const WebContentsCreatedCallback& callback);
 
@@ skipping 160 matching lines @@
   // This is used to ensure pending tasks will not fire after this object is
   // destroyed.
   base::WeakPtrFactory<GuestViewBase> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GuestViewBase);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_GUEST_VIEW_GUEST_VIEW_BASE_H_