Wire up /batches in skiaserve

tools/skiaserve/Response.h

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef Reponse_DEFINED
 #define Reponse_DEFINED
 
 struct MHD_Connection;
 struct Request;
 class SkData;
 
 namespace Response {
     // SendOK just sends an empty response with a 200 OK status code.
     int SendOK(MHD_Connection* connection);
 
     int SendError(MHD_Connection* connection, const char* msg);
 
     int SendData(MHD_Connection* connection, const SkData* data, const char* type,
                  bool setContentDisposition = false, const char* dispositionString = nullptr);
 
-    int SendJSON(MHD_Connection* connection, Request* request, int n);
-
     int SendTemplate(MHD_Connection* connection, bool redirect = false,
                      const char* redirectUrl = nullptr);
 }
 
 #endif