[SyncFS] Move SyncFS V1 files from drive_backend to drive_backend_v1

chrome/browser/sync_file_system/drive_backend_v1/api_util_interface.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_API_UTIL_INTERFACE_H_
-#define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_API_UTIL_INTERFACE_H_
+#ifndef CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_V1_API_UTIL_INTERFACE_H_
+#define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_V1_API_UTIL_INTERFACE_H_
 
 #include <string>
 
 #include "base/callback_forward.h"
 #include "chrome/browser/google_apis/gdata_errorcode.h"
 #include "chrome/browser/google_apis/gdata_wapi_parser.h"
 
 class GURL;
 class Profile;
 
@@ skipping 175 matching lines @@
   virtual void EnsureSyncRootIsNotInMyDrive(
       const std::string& sync_root_resource_id) = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(APIUtilInterface);
 };
 
 }  // namespace drive_backend
 }  // namespace sync_file_system
 
-#endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_API_UTIL_INTERFACE_H_
+#endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_V1_API_UTIL_INTERFACE_H_