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

chrome/browser/chromeos/boot_times_recorder.cc

 // Copyright (c) 2012 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/boot_times_recorder.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 134 matching lines @@
 }
 
 std::string BootTimesRecorder::Stats::SerializeToString() const {
   if (uptime_.empty() && disk_.empty())
     return std::string();
   base::DictionaryValue dictionary;
   dictionary.SetString(kUptime, uptime_);
   dictionary.SetString(kDisk, disk_);
 
   std::string result;
-  if (!base::JSONWriter::Write(&dictionary, &result)) {
+  if (!base::JSONWriter::Write(dictionary, &result)) {
     LOG(WARNING) << "BootTimesRecorder::Stats::SerializeToString(): failed.";
     return std::string();
   }
 
   return result;
 }
 
 // static
 BootTimesRecorder::Stats BootTimesRecorder::Stats::DeserializeFromString(
     const std::string& source) {
@@ skipping 350 matching lines @@
           GetRenderWidgetHost(&web_contents->GetController());
       render_widget_hosts_loading_.erase(render_widget_host);
       break;
     }
     default:
       break;
   }
 }
 
 }  // namespace chromeos