Change more base::ListValue methods to use std::unique_ptr.

chrome/browser/permissions/chooser_context_base.cc

 // Copyright 2015 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/permissions/chooser_context_base.h"
 
 #include <utility>
 
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/content_settings/host_content_settings_map_factory.h"
@@ skipping 97 matching lines @@
   DCHECK_EQ(embedding_origin, embedding_origin.GetOrigin());
   DCHECK(object);
   DCHECK(IsValidObject(*object));
   std::unique_ptr<base::DictionaryValue> setting =
       GetWebsiteSetting(requesting_origin, embedding_origin);
   base::ListValue* object_list;
   if (!setting->GetList(kObjectListKey, &object_list)) {
     object_list = new base::ListValue();
     setting->Set(kObjectListKey, object_list);
   }
-  object_list->AppendIfNotPresent(object.release());
+  object_list->AppendIfNotPresent(std::move(object));
   SetWebsiteSetting(requesting_origin, embedding_origin, std::move(setting));
 }
 
 void ChooserContextBase::RevokeObjectPermission(
     const GURL& requesting_origin,
     const GURL& embedding_origin,
     const base::DictionaryValue& object) {
   DCHECK_EQ(requesting_origin, requesting_origin.GetOrigin());
   DCHECK_EQ(embedding_origin, embedding_origin.GetOrigin());
   DCHECK(IsValidObject(object));
@@ skipping 19 matching lines @@
   return value;
 }
 
 void ChooserContextBase::SetWebsiteSetting(const GURL& requesting_origin,
                                            const GURL& embedding_origin,
                                            std::unique_ptr<base::Value> value) {
   host_content_settings_map_->SetWebsiteSettingDefaultScope(
       requesting_origin, embedding_origin, data_content_settings_type_,
       std::string(), std::move(value));
 }