LogDog: Update to archival V2.

appengine/logdog/coordinator/endpoints/logs/service.go

 // 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.
 
 package logs
 
 import (
         "github.com/luci/luci-go/appengine/logdog/coordinator"
         "github.com/luci/luci-go/common/api/logdog_coordinator/logs/v1"
 )
 
 // Server is the user-facing log access and query endpoint service.
 type Server struct {
-        coordinator.Service
+        coordinator.ServiceBase
 
         // resultLimit is the maximum number of query results to return in a
         // single query. If zero, the default will be used.
         //
         // This is provided for testing purposes.
         resultLimit int
 }
 
+var _ logdog.LogsServer = (*Server)(nil)
+
 func (s *Server) limit(v int, d int) int {
         if s.resultLimit > 0 {
                 d = s.resultLimit
         }
         if v <= 0 || v > d {
                 return d
         }
         return v
 }
-
-var _ logdog.LogsServer = (*Server)(nil)