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

chromeos/network/network_configuration_handler_unittest.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 <map>
 #include <set>
 
 #include "base/bind.h"
 #include "base/json/json_writer.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 28 matching lines @@
   return arg.Equals(value);
 }
 
 namespace chromeos {
 
 namespace {
 
 static std::string PrettyJson(const base::DictionaryValue& value) {
   std::string pretty;
   base::JSONWriter::WriteWithOptions(
-      &value, base::JSONWriter::OPTIONS_PRETTY_PRINT, &pretty);
+      value, base::JSONWriter::OPTIONS_PRETTY_PRINT, &pretty);
   return pretty;
 }
 
 void DictionaryValueCallback(const std::string& expected_id,
                              const std::string& expected_json,
                              const std::string& service_path,
                              const base::DictionaryValue& dictionary) {
   std::string dict_str = PrettyJson(dictionary);
   EXPECT_EQ(expected_json, dict_str);
   EXPECT_EQ(expected_id, service_path);
@@ skipping 678 matching lines @@
   EXPECT_FALSE(test_observer->HasConfiguration(service_path));
   EXPECT_FALSE(test_observer->HasConfigurationInProfile(
       service_path, NetworkProfileHandler::GetSharedProfilePath()));
   EXPECT_FALSE(
       test_observer->HasConfigurationInProfile(service_path, user_profile));
 
   network_configuration_handler_->RemoveObserver(test_observer.get());
 }
 
 }  // namespace chromeos