Remove dead code

chrome/browser/jumplist_win.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_JUMPLIST_WIN_H_
 #define CHROME_BROWSER_JUMPLIST_WIN_H_
 
 #include <list>
 #include <string>
 #include <utility>
@@ skipping 52 matching lines @@
                        const content::NotificationDetails& details);
 
   // Registers (or unregisters) this object as an observer.
   // When the TabRestoreService object notifies the tab status is changed, this
   // class automatically updates an application JumpList.
   bool AddObserver(Profile* profile);
   void RemoveObserver();
 
   // Observer callback for TabRestoreService::Observer to notify when a tab is
   // added or removed.
-  // This function sends a query that retrieves "Most Visited" pages to
-  // HistoryService. When the query finishes successfully, HistoryService call
-  // OnSegmentUsageAvailable().
   virtual void TabRestoreServiceChanged(TabRestoreService* service);
 
   // Observer callback to notice when our associated TabRestoreService
   // is destroyed.
   virtual void TabRestoreServiceDestroyed(TabRestoreService* service);
 
   // Cancel a pending jumplist update.
   void CancelPendingUpdate();
 
   // Terminate the jumplist: cancel any pending updates and remove observer
@@ skipping 16 matching lines @@
   void AddWindow(const TabRestoreService::Window* window,
                  ShellLinkItemList* list,
                  size_t max_items);
 
   // Starts loading a favicon for each URL in |icon_urls_|.
   // This function sends a query to HistoryService.
   // When finishing loading all favicons, this function posts a task that
   // decompresses collected favicons and updates a JumpList.
   void StartLoadingFavicon();
 
-  // A callback function for HistoryService that notify when the "Most Visited"
-  // list is available.
-  // This function updates the ShellLinkItemList objects and send another query
-  // that retrieves a favicon for each URL in the list.
-  void OnSegmentUsageAvailable(CancelableRequestProvider::Handle handle,
-                               std::vector<PageUsageData*>* data);
-
   // A callback function for HistoryService that notify when a requested favicon
   // is available.
   // To avoid file operations, this function just attaches the given data to
   // a ShellLinkItem object.
   void OnFaviconDataAvailable(
       const favicon_base::FaviconImageResult& image_result);
 
   // Callback for TopSites that notifies when the "Most
   // Visited" list is available. This function updates the ShellLinkItemList
   // objects and send another query that retrieves a favicon for each URL in
@@ skipping 51 matching lines @@
   base::CancelableTaskTracker::TaskId task_id_;
 
   // Lock for most_visited_pages_, recently_closed_pages_, icon_urls_
   // as they may be used by up to 3 threads.
   base::Lock list_lock_;
 
   DISALLOW_COPY_AND_ASSIGN(JumpList);
 };
 
 #endif  // CHROME_BROWSER_JUMPLIST_WIN_H_