Convert JsonWriter::Write to taking a const ref for the in-param

chrome/browser/devtools/device/webrtc/send_command_request.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/devtools/device/webrtc/send_command_request.h"
 
 #include "base/json/json_writer.h"
 #include "base/values.h"
 #include "components/cloud_devices/common/cloud_devices_urls.h"
 #include "net/base/url_util.h"
 
 using local_discovery::GCDApiFlow;
 using local_discovery::GCDApiFlowRequest;
 
 namespace {
 
 const char kContentTypeJSON[] = "application/json";
 const char kCommandTimeoutMs[] = "20000";
 
 }  // namespace
 
 SendCommandRequest::SendCommandRequest(const base::DictionaryValue* request,
                                        Delegate* delegate)
     : delegate_(delegate) {
-  base::JSONWriter::Write(request, &upload_data_);
+  base::JSONWriter::Write(*request, &upload_data_);
   DCHECK(delegate_);
 }
 
 net::URLFetcher::RequestType SendCommandRequest::GetRequestType() {
   return net::URLFetcher::POST;
 }
 
 void SendCommandRequest::GetUploadData(std::string* upload_type,
                                        std::string* upload_data) {
   *upload_type = kContentTypeJSON;
   *upload_data = upload_data_;
 }
 
 void SendCommandRequest::OnGCDAPIFlowError(GCDApiFlow::Status status) {
   delegate_->OnCommandFailed();
 }
 
 void SendCommandRequest::OnGCDAPIFlowComplete(
     const base::DictionaryValue& value) {
   delegate_->OnCommandSucceeded(value);
 }
 
 GURL SendCommandRequest::GetURL() {
   GURL url = cloud_devices::GetCloudDevicesRelativeURL("commands");
   url = net::AppendQueryParameter(url, "expireInMs", kCommandTimeoutMs);
   url = net::AppendQueryParameter(url, "responseAwaitMs", kCommandTimeoutMs);
   return url;
 }