Template methods on Timer classes instead of the classes themselves.

chrome/browser/ui/webui/history_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_HISTORY_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_HISTORY_UI_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 189 matching lines @@
   // The info value that is returned to the front end with the query results.
   base::DictionaryValue results_info_value_;
 
   // The list of query results received from the history service.
   std::vector<HistoryEntry> query_results_;
 
   // The list of query results received from the history server.
   std::vector<HistoryEntry> web_history_query_results_;
 
   // Timer used to implement a timeout on a Web History response.
-  base::OneShotTimer<BrowsingHistoryHandler> web_history_timer_;
+  base::OneShotTimer web_history_timer_;
 
   ScopedObserver<history::HistoryService, history::HistoryServiceObserver>
       history_service_observer_;
 
   base::WeakPtrFactory<BrowsingHistoryHandler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowsingHistoryHandler);
 };
 
 class HistoryUI : public content::WebUIController {
  public:
   explicit HistoryUI(content::WebUI* web_ui);
   ~HistoryUI() override;
 
   static base::RefCountedMemory* GetFaviconResourceBytes(
       ui::ScaleFactor scale_factor);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(HistoryUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_HISTORY_UI_H_