Revert of Port HistoryService::GetVisibleVisitCountToHost to CancelableTaskTracker

chrome/browser/history/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 CHROME_BROWSER_HISTORY_HISTORY_SERVICE_H_
 #define CHROME_BROWSER_HISTORY_HISTORY_SERVICE_H_
 
 #include <set>
 #include <vector>
 
@@ skipping 273 matching lines @@
       base::CancelableTaskTracker* tracker);
 
   // Schedules a query to get the most recent redirects ending at the given
   // URL.
   base::CancelableTaskTracker::TaskId QueryRedirectsTo(
       const GURL& to_url,
       const QueryRedirectsCallback& callback,
       base::CancelableTaskTracker* tracker);
 
   typedef base::Callback<
-      void(bool,         // Were we able to determine the # of visits?
-           int,          // Number of visits.
-           base::Time)>  // Time of first visit. Only set if bool
-                         // is true and int is > 0.
+      void(Handle,
+           bool,        // Were we able to determine the # of visits?
+           int,         // Number of visits.
+           base::Time)> // Time of first visit. Only set if bool
+                        // is true and int is > 0.
       GetVisibleVisitCountToHostCallback;
 
   // Requests the number of user-visible visits (i.e. no redirects or subframes)
   // to all urls on the same scheme/host/port as |url|.  This is only valid for
   // HTTP and HTTPS URLs.
-  base::CancelableTaskTracker::TaskId GetVisibleVisitCountToHost(
+  Handle GetVisibleVisitCountToHost(
       const GURL& url,
-      const GetVisibleVisitCountToHostCallback& callback,
-      base::CancelableTaskTracker* tracker);
+      CancelableRequestConsumerBase* consumer,
+      const GetVisibleVisitCountToHostCallback& callback);
 
   // Called when QueryTopURLsAndRedirects completes. The vector contains a list
   // of the top |result_count| URLs.  For each of these URLs, there is an entry
   // in the map containing redirects from the URL.  For example, if we have the
   // redirect chain A -> B -> C and A is a top visited URL, then A will be in
   // the vector and "A => {B -> C}" will be in the map.
   typedef base::Callback<
       void(Handle,
            bool,  // Did we get the top urls and redirects?
            std::vector<GURL>*,  // List of top URLs.
@@ skipping 715 matching lines @@
   scoped_ptr<history::InMemoryURLIndex> in_memory_url_index_;
 
   ObserverList<history::VisitDatabaseObserver> visit_database_observers_;
 
   history::DeleteDirectiveHandler delete_directive_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(HistoryService);
 };
 
 #endif  // CHROME_BROWSER_HISTORY_HISTORY_SERVICE_H_