Enable history counting for time ranges.

components/history/core/browser/visit_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 COMPONENTS_HISTORY_CORE_BROWSER_VISIT_DATABASE_H_
 #define COMPONENTS_HISTORY_CORE_BROWSER_VISIT_DATABASE_H_
 
 #include <vector>
 
 #include "components/history/core/browser/history_types.h"
@@ skipping 160 matching lines @@
   // Gets the number of user-visible visits to all URLs on the same
   // scheme/host/port as |url|, as well as the time of the earliest visit.
   // "User-visible" is defined as in GetVisibleVisitsInRange() above, i.e.
   // excluding redirects and subframes.
   // This function is only valid for HTTP and HTTPS URLs; all other schemes
   // cause the function to return false.
   bool GetVisibleVisitCountToHost(const GURL& url,
                                   int* count,
                                   base::Time* first_visit);
 
-  // Gets the number of URLs as seen in chrome://history with infinite date
-  // range. "User-visible" is defined as in GetVisibleVisitsInRange() above,
-  // i.e. excluding redirects and subframes. Also, if a URL is visited in
-  // multiple days, the URL is counted once for each day. For determination
-  // of the date, timestamps are converted to dates using local time.
-  // Returns false if there's a failure executing the statement. True otherwise.
-  bool GetHistoryCount(int* count);
+  // Gets the number of URLs as seen in chrome://history within the time
+  // range [|begin_time|, |end_time|). "User-visible" is defined as in
+  // GetVisibleVisitsInRange() above, i.e. excluding redirects and subframes.
+  // Each URL is counted only once per day. For determination of the date,
+  // timestamps are converted to dates using local time. Returns false if
+  // there is a failure executing the statement. True otherwise.
+  bool GetHistoryCount(const base::Time& begin_time,
+                       const base::Time& end_time,
+                       int* count);
 
   // Get the time of the first item in our database.
   bool GetStartDate(base::Time* first_visit);
 
   // Get the source information about the given visits.
   void GetVisitsSource(const VisitVector& visits,
                        VisitSourceMap* sources);
 
  protected:
   // Returns the database for the functions in this interface.
@@ skipping 28 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(VisitDatabase);
 };
 
 // Rows, in order, of the visit table.
 #define HISTORY_VISIT_ROW_FIELDS \
     " id,url,visit_time,from_visit,transition,segment_id,visit_duration "
 
 }  // namespace history
 
 #endif  // COMPONENTS_HISTORY_CORE_BROWSER_VISIT_DATABASE_H_