Detect Kaspersky SSL MITM and give a helpful error message.

net/socket/ssl_client_socket_nss.h

Index: net/socket/ssl_client_socket_nss.h
diff --git a/net/socket/ssl_client_socket_nss.h b/net/socket/ssl_client_socket_nss.h
index 7d2f7cfe4178da634c637b9ffcfc8c354063fa7d..8573b48dd5f32c69c3cfadd613a88812af8ac8e9 100644
--- a/net/socket/ssl_client_socket_nss.h
+++ b/net/socket/ssl_client_socket_nss.h
@@ -223,6 +223,9 @@ class SSLClientSocketNSS : public SSLClientSocket {
   // True iff we believe that the user has an ESET product intercepting our
   // HTTPS connections.
   bool eset_mitm_detected_;
+  // True iff we believe that the user has a Kaspersky product intercepting our
+  // HTTPS connections.
+  bool kaspersky_mitm_detected_;
 
   // True iff |ssl_host_info_| contained a predicted certificate chain and
   // that we found the prediction to be correct.