Add TLS-SRP (RFC 5054) support

net/base/connection_type_histograms.h

Index: net/base/connection_type_histograms.h
diff --git a/net/base/connection_type_histograms.h b/net/base/connection_type_histograms.h
index e3e4a8428a5135d3e8f068156103215963fe7bc0..42cc04a1791ec2bde894dac83879a5d4adc26df7 100644
--- a/net/base/connection_type_histograms.h
+++ b/net/base/connection_type_histograms.h
@@ -35,6 +35,8 @@ enum ConnectionType {
   CONNECTION_SSL_TLS1 = 11,    // An SSL connection that uses TLS 1.0
   CONNECTION_SSL_TLS1_1 = 12,  // An SSL connection that uses TLS 1.1
   CONNECTION_SSL_TLS1_2 = 13,  // An SSL connection that uses TLS 1.2
+
+  CONNECTION_TLS_PASSWORD_AUTH = 14, // A TLS connection that uses password auth
   NUM_OF_CONNECTION_TYPES
 };