Clean up Cloud Print API flow code.

chrome/browser/printing/cloud_print/gcd_api_flow.cc

 // Copyright 2014 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.
 
 #include "chrome/browser/printing/cloud_print/gcd_api_flow.h"
 
 #include <memory>
 
 #include "chrome/browser/printing/cloud_print/gcd_api_flow_impl.h"
 #include "chrome/browser/printing/cloud_print/gcd_constants.h"
 #include "chrome/common/cloud_print/cloud_print_constants.h"
 #include "components/cloud_devices/common/cloud_devices_urls.h"
 
 namespace cloud_print {
 
 GCDApiFlow::Request::Request() {
 }
 
 GCDApiFlow::Request::~Request() {
 }
 
 net::URLFetcher::RequestType GCDApiFlow::Request::GetRequestType() {
   return net::URLFetcher::GET;
 }
 
-void GCDApiFlow::Request::GetUploadData(std::string* upload_type,
-                                        std::string* upload_data) {
-  *upload_type = std::string();
-  *upload_data = std::string();
-}
-
 std::unique_ptr<GCDApiFlow> GCDApiFlow::Create(
     net::URLRequestContextGetter* request_context,
     OAuth2TokenService* token_service,
     const std::string& account_id) {
   return std::unique_ptr<GCDApiFlow>(
       new GCDApiFlowImpl(request_context, token_service, account_id));
 }
 
 GCDApiFlow::GCDApiFlow() {
 }
 
 GCDApiFlow::~GCDApiFlow() {
 }
 
 CloudPrintApiFlowRequest::CloudPrintApiFlowRequest() {
 }
 
 CloudPrintApiFlowRequest::~CloudPrintApiFlowRequest() {
 }
 
 std::string CloudPrintApiFlowRequest::GetOAuthScope() {
   return cloud_devices::kCloudPrintAuthScope;
 }
 
 std::vector<std::string> CloudPrintApiFlowRequest::GetExtraRequestHeaders() {
   return std::vector<std::string>(1, cloud_print::kChromeCloudPrintProxyHeader);
 }
 
 }  // namespace cloud_print