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

content/shell/renderer/layout_test/leak_detector.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 "content/shell/renderer/layout_test/leak_detector.h"
 
 #include "base/json/json_writer.h"
 #include "base/logging.h"
 #include "base/values.h"
 #include "content/shell/renderer/layout_test/blink_test_runner.h"
@@ skipping 67 matching lines @@
   }
   if (previous_result_.numberOfLiveResources < result.numberOfLiveResources) {
     base::ListValue* list = new base::ListValue();
     list->AppendInteger(previous_result_.numberOfLiveResources);
     list->AppendInteger(result.numberOfLiveResources);
     detail.Set("numberOfLiveResources", list);
   }
 
   if (!detail.empty()) {
     std::string detail_str;
-    base::JSONWriter::Write(&detail, &detail_str);
+    base::JSONWriter::Write(detail, &detail_str);
     report.detail = detail_str;
     report.leaked = true;
   }
 
   previous_result_ = result;
   test_runner_->ReportLeakDetectionResult(report);
 }
 
 }  // namespace content