[SyncFS] Clean up V1 drive_file_sync_util.h dependency from V2

chrome/browser/sync_file_system/drive_backend/drive_backend_util.h

 // Copyright 2013 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_SYNC_FILE_SYSTEM_DRIVE_BACKEND_DRIVE_BACKEND_UTIL_H_
 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_DRIVE_BACKEND_UTIL_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "chrome/browser/sync_file_system/drive_backend/metadata_database.pb.h"
+#include "chrome/browser/sync_file_system/sync_status_code.h"
+#include "google_apis/drive/gdata_errorcode.h"
 #include "webkit/common/blob/scoped_file.h"
 
 namespace google_apis {
 class ChangeResource;
 class FileResource;
 class ResourceEntry;
 }
 
 namespace leveldb {
 class WriteBatch;
@@ skipping 26 matching lines @@
 
 std::string FileKindToString(FileKind file_kind);
 
 bool HasFileAsParent(const FileDetails& details, const std::string& file_id);
 
 std::string GetMimeTypeFromTitle(const base::FilePath& title);
 
 scoped_ptr<google_apis::ResourceEntry> GetOldestCreatedFolderResource(
     ScopedVector<google_apis::ResourceEntry> list);
 
+// Translates GDataErrorCode to SyncStatusCode.

[nhiroki, 2014/01/07 06:55:05]

nit: This comment seems a bit verbose and I think function name explains its
behavior well.

[tzik, 2014/01/07 14:02:41]

Done.

+SyncStatusCode GDataErrorCodeToSyncStatusCode(
+    google_apis::GDataErrorCode error);
+
 }  // namespace drive_backend
 }  // namespace sync_file_system
 
 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_DRIVE_BACKEND_UTIL_H_