Revert 167808 - Get rid of use of CreateStringValue in chromeos/ directory.

chrome/browser/chromeos/extensions/echo_private_api.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/extensions/echo_private_api.h"
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/values.h"
@@ skipping 16 matching lines @@
       chromeos::system::StatisticsProvider::GetInstance();
   std::string result;
   if (!chromeos::KioskModeSettings::Get()->IsKioskModeEnabled()) {
     // In Kiosk mode, we effectively disable the registration API
     // by always returning an empty code.
     if (type == kCouponType)
       provider->GetMachineStatistic(kCouponCodeKey, &result);
     else if (type == kGroupType)
       provider->GetMachineStatistic(kGroupCodeKey, &result);
   }
-  return new base::StringValue(result);
+  return Value::CreateStringValue(result);
 }
 
 }  // namespace
 
 
 GetRegistrationCodeFunction::GetRegistrationCodeFunction() {
 }
 
 GetRegistrationCodeFunction::~GetRegistrationCodeFunction() {
 }
 
 bool GetRegistrationCodeFunction::RunImpl() {
   std::string type;
   EXTENSION_FUNCTION_VALIDATE(args_->GetString(0, &type));
   SetResult(GetValueForRegistrationCodeType(type));
   return true;
 }