Rewrite simple uses of base::ListValue::Append() taking a raw pointer var.

extensions/browser/extension_prefs.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 "extensions/browser/extension_prefs.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <iterator>
@@ skipping 610 matching lines @@
 //   // permission supports detail, permission detail will be stored in value.
 //   ...
 // ]
 template<typename T>
 static base::ListValue* CreatePermissionList(const T& permissions) {
   base::ListValue* values = new base::ListValue();
   for (typename T::const_iterator i = permissions.begin();
       i != permissions.end(); ++i) {
     std::unique_ptr<base::Value> detail(i->ToValue());
     if (detail) {
-      base::DictionaryValue* tmp = new base::DictionaryValue();
+      std::unique_ptr<base::DictionaryValue> tmp(new base::DictionaryValue());
       tmp->Set(i->name(), detail.release());
-      values->Append(tmp);
+      values->Append(std::move(tmp));
     } else {
       values->AppendString(i->name());
     }
   }
   return values;
 }
 
 void ExtensionPrefs::SetExtensionPrefPermissionSet(
     const std::string& extension_id,
     const std::string& pref_key,
@@ skipping 1342 matching lines @@
   extension_pref_value_map_->RegisterExtension(
       extension_id, install_time, is_enabled, is_incognito_enabled);
 
   FOR_EACH_OBSERVER(
       ExtensionPrefsObserver,
       observer_list_,
       OnExtensionRegistered(extension_id, install_time, is_enabled));
 }
 
 }  // namespace extensions