Remove old history UI, and replace with history2.

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>
 
@@ skipping 54 matching lines @@
 
   // Current search text.
   string16 search_text_;
 
   // Our consumer for search requests to the history service.
   CancelableRequestConsumerT<int, 0> cancelable_search_consumer_;
 
   // 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 ChromeWebUI {
  public:
   explicit HistoryUI(TabContents* 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_