Detect Kaspersky SSL MITM and give a helpful error message.

net/base/net_error_list.h

Index: net/base/net_error_list.h
diff --git a/net/base/net_error_list.h b/net/base/net_error_list.h
index 6cf561b01aaf4cd70bd685083d93a28cba36cfaf..5fea680f697c18b07bb8dfec0468e9d97fec0e2f 100644
--- a/net/base/net_error_list.h
+++ b/net/base/net_error_list.h
@@ -187,6 +187,7 @@ NET_ERROR(MANDATORY_PROXY_CONFIGURATION_FAILED, -131)
 // We detected an ESET product intercepting our HTTPS connections. Since these
 // products are False Start intolerant, we return this error so that we can
 // give the user a helpful error message rather than have the connection hang.
+// See also: KASPERSKY_ANTI_VIRUS_SSL_INTERCEPTION
 NET_ERROR(ESET_ANTI_VIRUS_SSL_INTERCEPTION, -132)
 
 // We've hit the max socket limit for the socket pool while preconnecting.  We
@@ -252,6 +253,13 @@ NET_ERROR(DNS_SERVER_FAILED, -145)
 // WebSocket abort SocketStream connection when alternate protocol is found.
 NET_ERROR(PROTOCOL_SWITCHED, -146)
 
+// We detected a Kaspersky product intercepting our HTTPS connections. This
+// interacts badly with our SSL stack for unknown reasons (disabling False
+// Start doesn't help). We return this error so that we can give the user a
+// helpful error message rather than have the connection hang.
+// See also: ESET_ANTI_VIRUS_SSL_INTERCEPTION
+NET_ERROR(KASPERSKY_ANTI_VIRUS_SSL_INTERCEPTION, -147)
+
 // Certificate error codes
 //
 // The values of certificate error codes must be consecutive.