drive: Change the return type of ResourceMetadata's methods to FileError

chrome/browser/chromeos/drive/change_list_loader.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_CHROMEOS_DRIVE_CHANGE_LIST_LOADER_H_
 #define CHROME_BROWSER_CHROMEOS_DRIVE_CHANGE_LIST_LOADER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 145 matching lines @@
   // starts loading from the server, and runs |callback| to tell the result to
   // the caller when it is finished.
   //
   // |callback| must not be null.
   void LoadIfNeeded(const FileOperationCallback& callback);
 
  private:
   // Starts the resource metadata loading and calls |callback| when it's done.
   void Load(const FileOperationCallback& callback);
   void LoadAfterGetLargestChangestamp(bool is_initial_load,
-                                      int64 local_changestamp);
+                                      const int64* local_changestamp,
+                                      FileError error);
   void LoadAfterGetAboutResource(
       int64 local_changestamp,
       google_apis::GDataErrorCode status,
       scoped_ptr<google_apis::AboutResource> about_resource);
 
   // Part of Load().
   // This function should be called when the change list load is complete.
   // Flushes the callbacks for change list loading and all directory loading.
   void OnChangeListLoadComplete(FileError error);
 
@@ skipping 40 matching lines @@
   // Note: This should remain the last member so it'll be destroyed and
   // invalidate its weak pointers before any other members are destroyed.
   base::WeakPtrFactory<ChangeListLoader> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(ChangeListLoader);
 };
 
 }  // namespace internal
 }  // namespace drive
 
 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_CHANGE_LIST_LOADER_H_