token-server: Add protos for new API for generating service account tokens.

server/auth/delegation_test.go

 // Copyright 2016 The LUCI Authors. All rights reserved.
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
 package auth
 
 import (
         "math/rand"
         "testing"
         "time"
@@ skipping 10 matching lines @@
 
         . "github.com/smartystreets/goconvey/convey"
 )
 
 type tokenMinterMock struct {
         request  minter.MintDelegationTokenRequest
         response minter.MintDelegationTokenResponse
         err      error
 }
 
-func (m *tokenMinterMock) MintMachineToken(context.Context, *minter.MintMachineTokenRequest, ...grpc.CallOption) (*minter.MintMachineTokenResponse, error) {
-        panic("not implemented")
-}
-
 func (m *tokenMinterMock) MintDelegationToken(ctx context.Context, in *minter.MintDelegationTokenRequest, opts ...grpc.CallOption) (*minter.MintDelegationTokenResponse, error) {
         m.request = *in
         if m.err != nil {
                 return nil, m.err
         }
         return &m.response, nil
 }
 
 func TestMintDelegationToken(t *testing.T) {
         t.Parallel()
@@ skipping 88 matching lines @@
                         So(mockedClient.request, ShouldResemble, minter.MintDelegationTokenRequest{
                                 DelegatedIdentity: "user:abc@example.com",
                                 ValidityDuration:  10800,
                                 Audience:          []string{"REQUESTOR"},
                                 Services:          []string{"*"},
                                 Intent:            "intent",
                         })
                 })
         })
 }