They were disabled during the Chromium 61 upgrade. Fix them and enable.

/cc @alespergl 
atom/common/api/atom_api_native_image.cc
if (!path.ReferencesParent()) {
    return path;
  }
  base::FilePath absolute_path = MakeAbsoluteFilePath(path);
  
  if (absolute_path.empty()) {
    return path;
  } else {
    return absolute_path;
  }
}
#if defined(OS_MACOSX)
bool IsTemplateFilename(const base::FilePath& path) {
  return (base::MatchPattern(path.value(), "*Template.*") ||
          base::MatchPattern(path.value(), "*Template@*x.*"));
}
#endif
#if defined(OS_WIN)
base::win::ScopedHICON ReadICOFromPath(int size, const base::FilePath& path) {