Surface SCT (Signed Certificate Timestamp) counts in the Security panel.

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index eb2a6374f78a2cbec507a18af16f50b52c825623..679d7ec3a17ebd5297547f1470912923e041b6f0 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -14401,6 +14401,21 @@ Please check your email at <ph name="ACCOUNT_EMAIL">$2<ex>jane.doe@gmail.com</ex
       <message name="IDS_SECURE_PROTOCOL_AND_CIPHERSUITE_DESCRIPTION" desc="Description of a site that uses a modern, secure TLS protocol version and ciphersuite.">
         The connection to this site is using a strong protocol version and cipher suite.
       </message>
+      <message name="IDS_SIGNED_CERTIFICATE_TIMESTAMPS_NOT_PRESENT" desc="A phrase that describes that the security certificate sent by a website WAS NOT accompanied by enough valid records (Signed Certificate Timestamps) that assert that the certificate can be audited in public logs (Certificate Transparency logs).">
+        Not present
+      </message>
+      <message name="IDS_SIGNED_CERTIFICATE_TIMESTAMPS_VALID_EV" desc="A phrase that describes that the security certificate sent by a website WAS accompanied by enough valid records (Signed Certificate Timestamps) that assert that the certificate can be audited in public logs (Certificate Transparency logs). In addition, the amount was enough for the certificate to be consided to have Extended Validation.">
+        Present, valid, and sufficient for Extended Validation
+      </message>
+      <message name="IDS_SIGNED_CERTIFICATE_TIMESTAMPS_VALID" desc="A phrase that describes that the security certificate sent by a website WAS accompanied by enough valid records (Signed Certificate Timestamps) that assert that the certificate can be audited in public logs (Certificate Transparency logs).">
+        Present and valid
+      </message>
+      <message name="IDS_SIGNED_CERTIFICATE_TIMESTAMPS_INVALID" desc="A phrase that describes that the security certificate sent by a website WAS accompanied by records (Signed Certificate Timestamps) that assert that the certificate can be audited in public logs (Certificate Transparency logs). However, these records were invalid.">
+        Present but invalid
+      </message>
+      <message name="IDS_SIGNED_CERTIFICATE_TIMESTAMPS_UNKNOWN" desc="A phrase that describes that the security certificate sent by a website WAS accompanied by any records (Signed Certificate Timestamps) that assert that the certificate can be audited in public logs (Certificate Transparency logs). However, these records cannot be verified because they are from unknown logs.">
+        From unknown logs
+      </message>
       <message name="IDS_SAVE_PASSWORD_TITLE" desc="The title of the save password bubble when a password can be saved.">
         Do you want <ph name="PASSWORD_MANAGER_BRAND">$1<ex>Google Chrome</ex></ph> to save your password for <ph name="ORIGIN">$2<ex>example.com</ex></ph>?
       </message>