[SyncFS] Move SyncFS V1 files from drive_backend to drive_backend_v1

chrome/browser/sync_file_system/drive_backend/drive_file_sync_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_FILE_SYNC_UTIL_H_
-#define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_DRIVE_FILE_SYNC_UTIL_H_
-
-#include "chrome/browser/google_apis/gdata_errorcode.h"
-#include "chrome/browser/sync_file_system/sync_status_code.h"
-
-namespace sync_file_system {
-
-// Translates GDataErrorCode to SyncStatusCode.
-SyncStatusCode GDataErrorCodeToSyncStatusCode(
-    google_apis::GDataErrorCode error);
-
-// Enables or disables Drive API in Sync FileSystem API.
-// TODO(nhiroki): This method should go away when we completely migrate to
-// DriveAPI. (http://crbug.com/234557)
-void SetDisableDriveAPI(bool flag);
-
-// Returns true if we disable Drive API in Sync FileSystem API.
-// It is enabled by default but can be overridden by a command-line switch
-// (--disable-drive-api-for-syncfs) or by calling SetDisableDriveAPI().
-// TODO(nhiroki): This method should go away when we completely migrate to
-// DriveAPI. (http://crbug.com/234557)
-bool IsDriveAPIDisabled();
-
-class ScopedDisableDriveAPI {
- public:
-  ScopedDisableDriveAPI();
-  ~ScopedDisableDriveAPI();
-
- private:
-  bool was_disabled_;
-
-  DISALLOW_COPY_AND_ASSIGN(ScopedDisableDriveAPI);
-};
-
-}  // namespace sync_file_system
-
-#endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_DRIVE_FILE_SYNC_UTIL_H_