[uber] make the navigation controls an iframe

chrome/browser/ui/webui/uber/uber_ui.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_UBER_UBER_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_UBER_UBER_UI_H_
 #pragma once
 
 #include <string>
 
@@ skipping 25 matching lines @@
 
   // Creates and stores a WebUI for the given URL.
   void RegisterSubpage(const std::string& page_url);
 
   // The WebUI*s in this map are owned.
   SubpageMap sub_uis_;
 
   DISALLOW_COPY_AND_ASSIGN(UberUI);
 };
 
+class UberFrameUI : public content::WebUIController {
+ public:
+  explicit UberFrameUI(content::WebUI* web_ui);
+  virtual ~UberFrameUI();
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(UberFrameUI);
+};
+
 #endif  // CHROME_BROWSER_UI_WEBUI_UBER_UBER_UI_H_