Remove dead code

chrome/browser/jumplist_win.h

Index: chrome/browser/jumplist_win.h
diff --git a/chrome/browser/jumplist_win.h b/chrome/browser/jumplist_win.h
index 26be82c4314776119abbe7b62b5510aaa963d106..30739d68fbd23aa37394e2e7f1ecd0647839fae6 100644
--- a/chrome/browser/jumplist_win.h
+++ b/chrome/browser/jumplist_win.h
@@ -70,9 +70,6 @@ class JumpList : public TabRestoreServiceObserver,
 
   // 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
@@ -109,13 +106,6 @@ class JumpList : public TabRestoreServiceObserver,
   // 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