DoTruncateFile    374 chrome/browser/sync_file_system/local/canned_syncable_file_system.cc       base::Bind(&CannedSyncableFileSystem::DoTruncateFile,
DoTruncateFile    180 chrome/browser/sync_file_system/local/canned_syncable_file_system.h   void DoTruncateFile(const fileapi::FileSystemURL& url,