[Content] Update V8ValueConverter::create to return a std::unique_ptr

extensions/renderer/test_features_native_handler.cc

Index: extensions/renderer/test_features_native_handler.cc
diff --git a/extensions/renderer/test_features_native_handler.cc b/extensions/renderer/test_features_native_handler.cc
index 45c02446755a57d2fb7842544df5acb51c6c5a58..6e25f0a988aa306a61cec80d0875293768638c75 100644
--- a/extensions/renderer/test_features_native_handler.cc
+++ b/extensions/renderer/test_features_native_handler.cc
@@ -23,10 +23,8 @@ void TestFeaturesNativeHandler::GetAPIFeatures(
     const v8::FunctionCallbackInfo<v8::Value>& args) {
   std::unique_ptr<JSONFeatureProviderSource> source(
       ExtensionsClient::Get()->CreateAPIFeatureSource());
-  std::unique_ptr<content::V8ValueConverter> converter(
-      content::V8ValueConverter::create());
-  args.GetReturnValue().Set(
-      converter->ToV8Value(&source->dictionary(), context()->v8_context()));
+  args.GetReturnValue().Set(content::V8ValueConverter::Create()->ToV8Value(
+      &source->dictionary(), context()->v8_context()));
 }
 
 }  // namespace extensions