Record whether a SSL warning is caused by a self-signed cert

chrome/browser/ssl/ssl_error_classification.cc

Index: chrome/browser/ssl/ssl_error_classification.cc
diff --git a/chrome/browser/ssl/ssl_error_classification.cc b/chrome/browser/ssl/ssl_error_classification.cc
index a8c1806ee3b1323d4fcfc0ab65b82c9273835ad1..324bc18eced1f735bf0890fa61f5b395cbd68903 100644
--- a/chrome/browser/ssl/ssl_error_classification.cc
+++ b/chrome/browser/ssl/ssl_error_classification.cc
@@ -53,6 +53,7 @@ enum SSLInterstitialCause {
   LOCALHOST,
   PRIVATE_URL,
   AUTHORITY_ERROR_CAPTIVE_PORTAL,
+  SELF_SIGNED,
   UNUSED_INTERSTITIAL_CAUSE_ENTRY,
 };
 
@@ -334,6 +335,8 @@ void SSLErrorClassification::RecordUMAStatistics(
         RecordSSLInterstitialCause(overridable, PRIVATE_URL);
       if (captive_portal_probe_completed_ && captive_portal_detected_)
         RecordSSLInterstitialCause(overridable, AUTHORITY_ERROR_CAPTIVE_PORTAL);
+      if (net::X509Certificate::IsSelfSigned(cert_.os_cert_handle()))
+        RecordSSLInterstitialCause(overridable, SELF_SIGNED);
       break;
     }
     default: