First version of the time slicing on the urls. Not ready for review yet.

chrome/browser/history/history.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_H_
 #define CHROME_BROWSER_HISTORY_HISTORY_H_
 #pragma once
 
 #include <set>
 #include <vector>
@@ skipping 31 matching lines @@
 
 namespace history {
 class InMemoryHistoryBackend;
 class InMemoryURLIndex;
 class InMemoryURLIndexTest;
 class HistoryAddPageArgs;
 class HistoryBackend;
 class HistoryDatabase;
 struct HistoryDetails;
 class HistoryQueryTest;
+class TimeFilter;
 class URLDatabase;
 }  // namespace history
 
 
 // HistoryDBTask can be used to process arbitrary work on the history backend
 // thread. HistoryDBTask is scheduled using HistoryService::ScheduleDBTask.
 // When HistoryBackend processes the task it invokes RunOnDBThread. Once the
 // task completes and has not been canceled, DoneRunOnMainThread is invoked back
 // on the main thread.
 class HistoryDBTask : public base::RefCountedThreadSafe<HistoryDBTask> {
@@ skipping 293 matching lines @@
   typedef base::Callback<void(Handle, history::MostVisitedURLList)>
       QueryMostVisitedURLsCallback;
 
   // Request the |result_count| most visited URLs and the chain of
   // redirects leading to each of these URLs. |days_back| is the
   // number of days of history to use. Used by TopSites.
   Handle QueryMostVisitedURLs(int result_count, int days_back,
                               CancelableRequestConsumerBase* consumer,
                               const QueryMostVisitedURLsCallback& callback);
 
+  // Request the |result_count| most visited URLs during the time peiods
+  // specified in the |filter|.
+  Handle QueryMostVisitedURLsDuringTime(
+      int result_count,
+      const history::TimeFilter& filter,
+      CancelableRequestConsumerBase* consumer,
+      const QueryMostVisitedURLsCallback& callback);
+
   // Thumbnails ----------------------------------------------------------------
 
   // Implemented by consumers to get thumbnail data. Called when a request for
   // the thumbnail data is complete. Once this callback is made, the request
   // will be completed and no other calls will be made for that handle.
   //
   // This function will be called even on error conditions or if there is no
   // thumbnail for that page. In these cases, the data pointer will be NULL.
   typedef base::Callback<void(Handle, scoped_refptr<RefCountedBytes>)>
       ThumbnailDataCallback;
@@ skipping 495 matching lines @@
   // True if needs top site migration.
   bool needs_top_sites_migration_;
 
   // The index used for quick history lookups.
   scoped_ptr<history::InMemoryURLIndex> in_memory_url_index_;
 
   DISALLOW_COPY_AND_ASSIGN(HistoryService);
 };
 
 #endif  // CHROME_BROWSER_HISTORY_HISTORY_H_