diff --git a/extensions/browser/warning_service_factory.cc b/extensions/browser/warning_service_factory.cc
index 7efc2a9230777e..345157c0627107 100644
--- a/extensions/browser/warning_service_factory.cc
+++ b/extensions/browser/warning_service_factory.cc
@@ -35,9 +35,10 @@ WarningServiceFactory::WarningServiceFactory()
 WarningServiceFactory::~WarningServiceFactory() {
 }
 
-KeyedService* WarningServiceFactory::BuildServiceInstanceFor(
+std::unique_ptr<KeyedService>
+WarningServiceFactory::BuildServiceInstanceForBrowserContext(
     BrowserContext* context) const {
-  return new WarningService(context);
+  return std::make_unique<WarningService>(context);
 }
 
 BrowserContext* WarningServiceFactory::GetBrowserContextToUse(
diff --git a/extensions/browser/warning_service_factory.h b/extensions/browser/warning_service_factory.h
index 1de59d7b88ca09..272a74fc1ff63b 100644
--- a/extensions/browser/warning_service_factory.h
+++ b/extensions/browser/warning_service_factory.h
@@ -27,7 +27,7 @@ class WarningServiceFactory : public BrowserContextKeyedServiceFactory {
   ~WarningServiceFactory() override;
 
   // BrowserContextKeyedServiceFactory implementation
-  KeyedService* BuildServiceInstanceFor(
+  std::unique_ptr<KeyedService> BuildServiceInstanceForBrowserContext(
       content::BrowserContext* context) const override;
   content::BrowserContext* GetBrowserContextToUse(
       content::BrowserContext* context) const override;