| Index: chrome/common/chrome_switches.cc | 
| diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc | 
| index a125d337c7edd38610435a2ba76f5d90e21ad662..6713c8af721c7eea250989ad6509e585529afff7 100644 | 
| --- a/chrome/common/chrome_switches.cc | 
| +++ b/chrome/common/chrome_switches.cc | 
| @@ -103,13 +103,16 @@ const char kBypassAppBannerEngagementChecks[] = | 
| // Certificate Transparency: Uses the provided log(s) for checking Signed | 
| // Certificate Timestamps provided with certificates. | 
| // The switch's value is: | 
| -//   log_description:log_key:log_url,log_description:log_key:log_url,... | 
| +//   log_description:log_key:log_url[:log_dns_domain],log_description:log_key:log_url[:log_dns_domain],... | 
| // where | 
| //   log_description is a textual description of the log. | 
| //   log_key is a Base64'd DER-encoded SubjectPublicKeyInfo of the log's | 
| //   public key. | 
| //   log_url is a URL for the log, excluding the schema (which is always | 
| //   assumed to be HTTPS as required by RFC6962). | 
| +//   log_dns_domain is the domain name to use for DNS queries requesting | 
| +//   inclusion proofs (as per | 
| +//   https://github.com/google/certificate-transparency-rfcs/blob/master/dns/draft-ct-over-dns.md). | 
| // Multiple logs can be specified by repeating description:key pairs, | 
| // separated by a comma. | 
| const char kCertificateTransparencyLog[]    = "certificate-transparency-log"; | 
|  |