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

chrome/browser/chromeos/policy/remote_commands/device_command_screenshot_job.cc

 // 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.
 
 #include "chrome/browser/chromeos/policy/remote_commands/device_command_screenshot_job.h"
 
 #include <fstream>
 
 #include "ash/shell.h"
 #include "base/bind.h"
@@ skipping 63 matching lines @@
 
  private:
   std::string payload_;
 
   DISALLOW_COPY_AND_ASSIGN(Payload);
 };
 
 DeviceCommandScreenshotJob::Payload::Payload(ResultCode result_code) {
   base::DictionaryValue root_dict;
   if (result_code != SUCCESS)
-    root_dict.Set(kResultFieldName, new base::FundamentalValue(result_code));
-  base::JSONWriter::Write(&root_dict, &payload_);
+    root_dict.SetInteger(kResultFieldName, result_code);
+  base::JSONWriter::Write(root_dict, &payload_);
 }
 
 scoped_ptr<std::string> DeviceCommandScreenshotJob::Payload::Serialize() {
   return make_scoped_ptr(new std::string(payload_));
 }
 
 DeviceCommandScreenshotJob::DeviceCommandScreenshotJob(
     scoped_ptr<Delegate> screenshot_delegate)
     : num_pending_screenshots_(0),
       screenshot_delegate_(screenshot_delegate.Pass()),
@@ skipping 130 matching lines @@
                               weak_ptr_factory_.GetWeakPtr(), screen),
                    base::ThreadTaskRunnerHandle::Get()));
   }
 }
 
 void DeviceCommandScreenshotJob::TerminateImpl() {
   weak_ptr_factory_.InvalidateWeakPtrs();
 }
 
 }  // namespace policy