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

chrome/browser/ui/browser.cc

Index: chrome/browser/ui/browser.cc
diff --git a/chrome/browser/ui/browser.cc b/chrome/browser/ui/browser.cc
index 45656f345dc8030980bdb59c85a72aae68c8e96d..3eda0387f7e9a899c8318e6c9415f59cdb6ec0a3 100644
--- a/chrome/browser/ui/browser.cc
+++ b/chrome/browser/ui/browser.cc
@@ -1415,6 +1415,34 @@ content::SecurityStyle Browser::GetSecurityStyle(
   return security_style;
 }
 
+void Browser::GetCertificateTransparencySummary(bool is_valid_ev,
+                                                int num_unknown_scts,
+                                                int num_invalid_scts,
+                                                int num_valid_scts,
+                                                std::string* summary) {
+  if (num_unknown_scts == 0 && num_invalid_scts == 0 && num_valid_scts == 0) {
+    // No SCTs - no CT information.
+    *summary =
+        l10n_util::GetStringUTF8(IDS_SIGNED_CERTIFICATE_TIMESTAMPS_NOT_PRESENT);
+  } else if (num_valid_scts > 0) {
+    // Any valid SCT.
+    if (is_valid_ev)
+      *summary =
+          l10n_util::GetStringUTF8(IDS_SIGNED_CERTIFICATE_TIMESTAMPS_VALID_EV);
+    else
+      *summary =
+          l10n_util::GetStringUTF8(IDS_SIGNED_CERTIFICATE_TIMESTAMPS_VALID);
+  } else if (num_invalid_scts > 0) {
+    // Any invalid SCT.
+    *summary =
+        l10n_util::GetStringUTF8(IDS_SIGNED_CERTIFICATE_TIMESTAMPS_INVALID);
+  } else {
+    // All SCTs are from unknown logs.
+    *summary =
+        l10n_util::GetStringUTF8(IDS_SIGNED_CERTIFICATE_TIMESTAMPS_UNKNOWN);
+  }
+}
+
 void Browser::ShowCertificateViewerInDevTools(
     content::WebContents* web_contents, int cert_id) {
   DevToolsWindow* devtools_window =