Removes some dead database code

chrome/browser/history/visitsegment_database.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_VISITSEGMENT_DATABASE_H_
 #define CHROME_BROWSER_HISTORY_VISITSEGMENT_DATABASE_H_
 
 #include "base/basictypes.h"
 #include "chrome/browser/history/history_types.h"
 
 class PageUsageData;
 
 namespace sql {
 class Connection;
-class Statement;
 }
 
 namespace history {
 
 // Tracks pages used for the most visited view.
 class VisitSegmentDatabase {
  public:
   // Must call InitSegmentTables before using any other part of this class.
   VisitSegmentDatabase();
   virtual ~VisitSegmentDatabase();
 
   // Compute a segment name given a URL. The segment name is currently the
   // source url spec less some information such as query strings.
   static std::string ComputeSegmentName(const GURL& url);
 
-  // The segment tables use the time as a key for visit count and duration. This
-  // returns the appropriate time.
-  static base::Time SegmentTime(base::Time time);
-
   // Returns the ID of the segment with the corresponding name, or 0 if there
   // is no segment with that name.
   SegmentID GetSegmentNamed(const std::string& segment_name);
 
   // Update the segment identified by |out_segment_id| with the provided URL ID.
   // The URL identifies the page that will now represent the segment. If url_id
   // is non zero, it is assumed to be the row id of |url|.
   bool UpdateSegmentRepresentationURL(SegmentID segment_id,
                                       URLID url_id);
 
@@ skipping 21 matching lines @@
   // stamp.
   bool DeleteSegmentData(base::Time older_than);
 
   // Change the presentation id for the segment identified by |segment_id|
   bool SetSegmentPresentationIndex(SegmentID segment_id, int index);
 
   // Delete the segment currently using the provided url for representation.
   // This will also delete any associated segment usage data.
   bool DeleteSegmentForURL(URLID url_id);
 
-  // Creates a new SegmentDurationID for the SegmentID and Time pair. The
-  // duration is set to |delta|.
-  SegmentDurationID CreateSegmentDuration(SegmentID segment_id,
-                                          base::Time time,
-                                          base::TimeDelta delta);
-
-  // Sets the duration of the |duration_id| to |time_delta|.
-  bool SetSegmentDuration(SegmentDurationID duration_id,
-                          base::TimeDelta time_delta);
-
-  // Gets the SegmentDurationID of the |segment_id| and |time| pair. Returns
-  // true on success and sets |duration_id| and |time_delta| appropriately.
-  bool GetSegmentDuration(SegmentID segment_id,
-                          base::Time time,
-                          SegmentDurationID* duration_id,
-                          base::TimeDelta* time_delta);
-
-  // Queries segments by duration.
-  void QuerySegmentDuration(base::Time from_time,
-                            int max_result_count,
-                            std::vector<PageUsageData*>* result);
-
  protected:
   // Returns the database for the functions in this interface.
   virtual sql::Connection& GetDB() = 0;
 
   // Creates the tables used by this class if necessary. Returns true on
   // success.
   bool InitSegmentTables();
 
   // Deletes all the segment tables, returning true on success.
   bool DropSegmentTables();
 
   // Removes the 'pres_index' column from the segments table and the
   // presentation table is removed entirely.
   bool MigratePresentationIndex();
 
  private:
-  enum QueryType {
-    QUERY_VISIT_COUNT,
-    QUERY_DURATION,
-  };
-
-  // Used by both QuerySegment fucntions.
-  void QuerySegmentsCommon(sql::Statement* statement,
-                           base::Time from_time,
-                           int max_result_count,
-                           QueryType query_type,
-                           std::vector<PageUsageData*>* result);
-
-  // Was the |segment_duration| table created?
-  const bool has_duration_table_;
-
   DISALLOW_COPY_AND_ASSIGN(VisitSegmentDatabase);
 };
 
 }  // namespace history
 
 #endif  // CHROME_BROWSER_HISTORY_VISITSEGMENT_DATABASE_H_