Removes some dead database code

chrome/browser/history/visitsegment_database.h

Index: chrome/browser/history/visitsegment_database.h
diff --git a/chrome/browser/history/visitsegment_database.h b/chrome/browser/history/visitsegment_database.h
index 49f9f632818207e899b890b043047693ca01ef25..b2242882eef0493d37f26ee33be0c51ad455ad27 100644
--- a/chrome/browser/history/visitsegment_database.h
+++ b/chrome/browser/history/visitsegment_database.h
@@ -12,7 +12,6 @@ class PageUsageData;
 
 namespace sql {
 class Connection;
-class Statement;
 }
 
 namespace history {
@@ -28,10 +27,6 @@ class VisitSegmentDatabase {
   // 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);
@@ -73,28 +68,6 @@ class VisitSegmentDatabase {
   // 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;
@@ -111,21 +84,6 @@ class VisitSegmentDatabase {
   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);
 };