Change AndroidHistoryProviderService to use CancelableTaskTracker (3/6)

chrome/browser/history/history_backend.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_BACKEND_H_
 #define CHROME_BROWSER_HISTORY_HISTORY_BACKEND_H_
 
 #include <set>
 #include <string>
 #include <utility>
@@ skipping 296 matching lines @@
       scoped_refptr<DeleteRequest> request,
       const std::string& selection,
       const std::vector<base::string16>& selection_args);
 
   void DeleteHistory(scoped_refptr<DeleteRequest> request,
                      const std::string& selection,
                      const std::vector<base::string16>& selection_args);
 
   // Statement ----------------------------------------------------------------
   // Move the statement's current position.
-  void MoveStatement(scoped_refptr<MoveStatementRequest> request,
-                     history::AndroidStatement* statement,
-                     int current_pos,
-                     int destination);
+  int MoveStatement(history::AndroidStatement* statement,
+                    int current_pos,
+                    int destination);
 
   // Close the given statement. The ownership is transfered.
   void CloseStatement(AndroidStatement* statement);
 
   // Search terms -------------------------------------------------------------
   void InsertSearchTerm(scoped_refptr<InsertRequest> request,
                         const SearchRow& row);
 
   void UpdateSearchTerms(scoped_refptr<UpdateRequest> request,
                          const SearchRow& row,
@@ skipping 534 matching lines @@
 
   // Listens for the system being under memory pressure.
   scoped_ptr<base::MemoryPressureListener> memory_pressure_listener_;
 
   DISALLOW_COPY_AND_ASSIGN(HistoryBackend);
 };
 
 }  // namespace history
 
 #endif  // CHROME_BROWSER_HISTORY_HISTORY_BACKEND_H_