Use std::unique_ptr for base::DictionaryValue and base::ListValue's internal store.

chrome/browser/extensions/api/gcd_private/gcd_private_api.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 "chrome/browser/extensions/api/gcd_private/gcd_private_api.h"
 
 #include "base/lazy_instance.h"
 #include "base/macros.h"
 #include "base/memory/linked_ptr.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 294 matching lines @@
 void GcdPrivateCreateSessionFunction::OnSessionInitialized(
     int session_id,
     api::gcd_private::Status status,
     const base::DictionaryValue& info) {
   std::vector<api::gcd_private::PairingType> pairing_types;
 
   // TODO(vitalybuka): Remove this parsing and |pairing_types| from callback.
   if (status == gcd_private::STATUS_SUCCESS) {
     const base::ListValue* pairing = nullptr;
     if (info.GetList("authentication.pairing", &pairing)) {
-      for (const base::Value* value : *pairing) {
+      for (const auto& value : *pairing) {
         std::string pairing_string;
         if (value->GetAsString(&pairing_string)) {
           api::gcd_private::PairingType pairing_type =
               api::gcd_private::ParsePairingType(pairing_string);
           if (pairing_type != api::gcd_private::PAIRING_TYPE_NONE)
             pairing_types.push_back(pairing_type);
         }
       }
     } else {
       status = gcd_private::STATUS_SESSIONERROR;
@@ skipping 111 matching lines @@
 
   GcdPrivateAPIImpl* gcd_api = GcdPrivateAPIImpl::Get(GetProfile());
 
   gcd_api->RemoveSession(params->session_id);
 
   SendResponse(true);
   return true;
 }
 
 }  // namespace extensions