Removes some dead database code

chrome/browser/history/history_service.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_HISTORY_HISTORY_SERVICE_H_
 #define CHROME_BROWSER_HISTORY_HISTORY_SERVICE_H_
 
 #include <set>
 #include <vector>
 
@@ skipping 452 matching lines @@
   // from the vector.
   //
   // The vector contains a list of PageUsageData. Each PageUsageData ID is set
   // to the segment ID. The URL and all the other information is set to the page
   // representing the segment.
   Handle QuerySegmentUsageSince(CancelableRequestConsumerBase* consumer,
                                 const base::Time from_time,
                                 int max_result_count,
                                 const SegmentQueryCallback& callback);
 
-  // Increases the amount of time the user actively viewed the url.
-  void IncreaseSegmentDuration(const GURL& url,
-                               base::Time time,
-                               base::TimeDelta delta);
-
-  // Queries segments based on active time viewed.
-  Handle QuerySegmentDurationSince(CancelableRequestConsumerBase* consumer,
-                                   base::Time from_time,
-                                   int max_result_count,
-                                   const SegmentQueryCallback& callback);
-
   // Keyword search terms -----------------------------------------------------
 
   // Sets the search terms for the specified url and keyword. url_id gives the
   // id of the url, keyword_id the id of the keyword and term the search term.
   void SetKeywordSearchTermsForURL(const GURL& url,
                                    TemplateURLID keyword_id,
                                    const base::string16& term);
 
   // Deletes all search terms for the specified keyword.
   void DeleteAllSearchTermsForKeyword(TemplateURLID keyword_id);
@@ skipping 582 matching lines @@
   scoped_ptr<history::InMemoryURLIndex> in_memory_url_index_;
 
   ObserverList<history::VisitDatabaseObserver> visit_database_observers_;
 
   history::DeleteDirectiveHandler delete_directive_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(HistoryService);
 };
 
 #endif  // CHROME_BROWSER_HISTORY_HISTORY_SERVICE_H_