Changes client_token to be client_auth_token.

blimp/common/proto/protocol_control.proto

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 syntax = "proto2";
 
 option optimize_for = LITE_RUNTIME;
 
 package blimp;
 
 // Indicates the message-Id that the peer has most-recently processed.
 message CheckpointAckMessage {
   optional int64 checkpoint_id = 1;
 }
 
 // Contains Client->Engine information to establish an authenticated connection.
 message StartConnectionMessage {
-  optional string client_token = 1;
+  optional string client_auth_token = 1;
   optional int32 protocol_version = 2;
 }
 
 // Indicates the reason for the peer ending the connection.
 message EndConnectionMessage {
   enum Reason {
     UNKNOWN = 0;
     AUTHENTICATION_FAILED = 1;
     PROTOCOL_MISMATCH = 2;
   };
   optional Reason reason = 1;
 }
 
 message ProtocolControlMessage {
   oneof connection_message {
     // Client => Server types.
     StartConnectionMessage start_connection = 41;
 
     // Bi-directional types.
     CheckpointAckMessage checkpoint_ack = 42;
     EndConnectionMessage end_connection = 43;
   }
 }