base::ListValue::Append cleanup: pass unique_ptr instead of the released pointer.

chrome/browser/extensions/api/sync_file_system/extension_sync_event_observer.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/extensions/api/sync_file_system/extension_sync_event_observer.h"
 
 #include <utility>
 
 #include "base/lazy_instance.h"
 #include "chrome/browser/extensions/api/sync_file_system/sync_file_system_api_helpers.h"
@@ skipping 80 matching lines @@
     sync_file_system::SyncFileType file_type,
     sync_file_system::SyncFileStatus status,
     sync_file_system::SyncAction action,
     sync_file_system::SyncDirection direction) {
   std::unique_ptr<base::ListValue> params(new base::ListValue());
 
   std::unique_ptr<base::DictionaryValue> entry(
       CreateDictionaryValueForFileSystemEntry(url, file_type));
   if (!entry)
     return;
-  params->Append(entry.release());
+  params->Append(std::move(entry));
 
   // Status, SyncAction and any optional notes to go here.
   api::sync_file_system::FileStatus status_enum =
       SyncFileStatusToExtensionEnum(status);
   api::sync_file_system::SyncAction action_enum =
       SyncActionToExtensionEnum(action);
   api::sync_file_system::SyncDirection direction_enum =
       SyncDirectionToExtensionEnum(direction);
   params->AppendString(api::sync_file_system::ToString(status_enum));
   params->AppendString(api::sync_file_system::ToString(action_enum));
@@ skipping 34 matching lines @@
 }
 
 template <>
 void BrowserContextKeyedAPIFactory<
     ExtensionSyncEventObserver>::DeclareFactoryDependencies() {
   DependsOn(sync_file_system::SyncFileSystemServiceFactory::GetInstance());
   DependsOn(ExtensionsBrowserClient::Get()->GetExtensionSystemFactory());
 }
 
 }  // namespace extensions