GetMimeTypeFromExtensionHelper  103 net/base/mime_util.cc   bool GetMimeTypeFromExtensionHelper(const base::FilePath::StringType& ext,
GetMimeTypeFromExtensionHelper  196 net/base/mime_util.cc   return GetMimeTypeFromExtensionHelper(ext, true, result);
GetMimeTypeFromExtensionHelper  202 net/base/mime_util.cc   return GetMimeTypeFromExtensionHelper(ext, false, result);