Issue 501916 : Add data type counts to profile deletion flow

components/history/core/browser/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 COMPONENTS_HISTORY_CORE_BROWSER_HISTORY_SERVICE_H_
 #define COMPONENTS_HISTORY_CORE_BROWSER_HISTORY_SERVICE_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 313 matching lines @@
   typedef base::Callback<void(const FilteredURLList*)>
       QueryFilteredURLsCallback;
 
   base::CancelableTaskTracker::TaskId QueryFilteredURLs(
       int result_count,
       const VisitFilter& filter,
       bool extended_info,
       const QueryFilteredURLsCallback& callback,
       base::CancelableTaskTracker* tracker);
 
+  // Statistics ----------------------------------------------------------------
+
+  // Returns the count of URLs in the url database. The argument is the count.
+  // The count is zero if query to the database failed.
+  typedef base::Callback<void(int)> CountURLsCallback;
+
+  // Returns the count of URLs in the url database.
+  base::CancelableTaskTracker::TaskId HistoryService::CountURLs(
+      const CountURLsCallback& callback,
+      base::CancelableTaskTracker* tracker);
+
   // Database management operations --------------------------------------------
 
   // Delete all the information related to a single url.
   void DeleteURL(const GURL& url);
 
   // Delete all the information related to a list of urls.  (Deleting
   // URLs one by one is slow as it has to flush to disk each time.)
   void DeleteURLsForTest(const std::vector<GURL>& urls);
 
   // Removes all visits in the selected time range (including the
@@ skipping 87 matching lines @@
   void DeleteAllSearchTermsForKeyword(KeywordID keyword_id);
 
   // Deletes any search term corresponding to |url|.
   void DeleteKeywordSearchTermForURL(const GURL& url);
 
   // Deletes all URL and search term entries matching the given |term| and
   // |keyword_id|.
   void DeleteMatchingURLsForKeyword(KeywordID keyword_id,
                                     const base::string16& term);
 
+  // Statistics ----------------------------------------------------------------
+  void HistoryService::CountURLs(size_t* count);
+
   // Bookmarks -----------------------------------------------------------------
 
   // Notification that a URL is no longer bookmarked.
   void URLsNoLongerBookmarked(const std::set<GURL>& urls);
 
   // Observers -----------------------------------------------------------------
 
   // Adds/Removes an Observer.
   void AddObserver(HistoryServiceObserver* observer);
   void RemoveObserver(HistoryServiceObserver* observer);
@@ skipping 376 matching lines @@
 
   // All vended weak pointers are invalidated in Cleanup().
   base::WeakPtrFactory<HistoryService> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(HistoryService);
 };
 
 }  // namespace history
 
 #endif  // COMPONENTS_HISTORY_CORE_BROWSER_HISTORY_SERVICE_H_