Start splitting out WebUI into an implementation class and an interface that each page implements...

chrome/browser/ui/webui/history_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_HISTORY_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_HISTORY_UI_H_
 #pragma once
 
 #include <string>
 
 #include "base/string16.h"
 #include "chrome/browser/cancelable_request.h"
 #include "chrome/browser/history/history.h"
 #include "chrome/browser/ui/webui/chrome_url_data_manager.h"
 #include "content/browser/webui/web_ui.h"
 #include "content/public/browser/notification_registrar.h"
+#include "content/public/browser/web_ui_controller.h"
 #include "content/public/browser/web_ui_message_handler.h"
 
-class GURL;
-
 // The handler for Javascript messages related to the "history" view.
 class BrowsingHistoryHandler : public content::WebUIMessageHandler,
                                public content::NotificationObserver {
  public:
   BrowsingHistoryHandler();
   virtual ~BrowsingHistoryHandler();
 
   // WebUIMessageHandler implementation.
   virtual void RegisterMessages() OVERRIDE;
 
@@ skipping 40 matching lines @@
 
   // Our consumer for delete requests to the history service.
   CancelableRequestConsumerT<int, 0> cancelable_delete_consumer_;
 
   // The list of URLs that are in the process of being deleted.
   std::set<GURL> urls_to_be_deleted_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowsingHistoryHandler);
 };
 
-class HistoryUI : public WebUI {
+class HistoryUI : public WebUI, public content::WebUIController {
  public:
   explicit HistoryUI(content::WebContents* contents);
 
   // Return the URL for a given search term.
   static const GURL GetHistoryURLWithSearchText(const string16& text);
 
   static RefCountedMemory* GetFaviconResourceBytes();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(HistoryUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_HISTORY_UI_H_