Unframe chrome://extensions as it's the last (and only) uber item

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

-// 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.
-
-#ifndef CHROME_BROWSER_UI_WEBUI_UBER_UBER_UI_H_
-#define CHROME_BROWSER_UI_WEBUI_UBER_UBER_UI_H_
-
-#include <string>
-
-#include "base/macros.h"
-#include "base/values.h"
-#include "content/public/browser/web_contents_observer.h"
-#include "content/public/browser/web_ui_controller.h"
-
-// Logs visits to subframe URLs (e.g. chrome://settings-frame).
-class SubframeLogger : public content::WebContentsObserver {
- public:
-  explicit SubframeLogger(content::WebContents* contents);
-  ~SubframeLogger() override;
-
-  // content::WebContentsObserver implementation.
-  void DidFinishNavigation(
-      content::NavigationHandle* navigation_handle) override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(SubframeLogger);
-};
-
-// The WebUI class for the uber page (chrome://chrome). It manages the UI for
-// the uber page (navigation bar and so forth) as well as WebUI objects for
-// pages that appear in the uber page.
-class UberUI : public content::WebUIController {
- public:
-  explicit UberUI(content::WebUI* web_ui);
-  ~UberUI() override;
-
-  content::WebUI* GetSubpage(const std::string& page_url);
-
-  // WebUIController implementation.
-  bool OverrideHandleWebUIMessage(const GURL& source_url,
-                                  const std::string& message,
-                                  const base::ListValue& args) override;
-
-  // We forward these to |sub_uis_|.
-  void RenderFrameCreated(content::RenderFrameHost* render_frame_host) override;
-
- private:
-  // Creates and stores a WebUI for the given URL.
-  void RegisterSubpage(const std::string& page_url,
-                       const std::string& page_host);
-
-  std::unique_ptr<SubframeLogger> subframe_logger_;
-
-  // Map from URL origin to WebUI instance.
-  std::map<std::string, std::unique_ptr<content::WebUI>> sub_uis_;
-
-  DISALLOW_COPY_AND_ASSIGN(UberUI);
-};
-
-class UberFrameUI : public content::WebUIController {
- public:
-  explicit UberFrameUI(content::WebUI* web_ui);
-  ~UberFrameUI() override;
-};
-
-#endif  // CHROME_BROWSER_UI_WEBUI_UBER_UBER_UI_H_