...
enum ResultCode {
RESULT_CODE_CHROME_START = content::RESULT_CODE_LAST_CODE,
// An invalid command line url was given.
RESULT_CODE_INVALID_CMDLINE_URL = RESULT_CODE_CHROME_START,
// The process is of an unknown type.
RESULT_CODE_BAD_PROCESS_TYPE,
// A critical chrome file is missing.
...