Add additional UMA stats for remembering certificate decisions.

content/browser/ssl/ssl_policy.h

Index: content/browser/ssl/ssl_policy.h
diff --git a/content/browser/ssl/ssl_policy.h b/content/browser/ssl/ssl_policy.h
index 64b9c3a3b94e55a342b37081eafb44ccfb885f34..c9485d5e84e59578974de3f6d103bd2b00672e1b 100644
--- a/content/browser/ssl/ssl_policy.h
+++ b/content/browser/ssl/ssl_policy.h
@@ -55,9 +55,12 @@ class SSLPolicy {
   // guarantees of TLS. |strict_enforcement| indicates whether or not the
   // site the user is trying to connect to has requested strict enforcement
   // of certificate validation (e.g. with HTTP Strict-Transport-Security).
+  // |expried_previous_decision| indicates whether a user decision had been
+  // previously made but the decision has expired.
   void OnCertErrorInternal(SSLCertErrorHandler* handler,
                            bool overridable,
-                           bool strict_enforcement);
+                           bool strict_enforcement,
+                           bool expired_previous_decision);
 
   // If the security style of |entry| has not been initialized, then initialize
   // it with the default style for its URL.