Scaffolding for the PerformanceObserver TurboModule (C++ side) (#35226)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/35226

Changelog: [Internal]

This adds scaffolding for the C++ side of NativePerformanceObserver module.

Thanks to christophpurrer for helping set this up, as this is the first one of this kind inside core/OSS.

Reviewed By: rubennorte

Differential Revision: D41028555

fbshipit-source-id: 4acf0e71a254a42044cbbe5f94f40938342c6aa2

Libraries/WebPerformance/NativePerformanceObserver.cpp

@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#include "NativePerformanceObserver.h"
+#include <glog/logging.h>
+
+namespace facebook::react {
+
+NativePerformanceObserver::NativePerformanceObserver(
+    std::shared_ptr<CallInvoker> jsInvoker)
+    : NativePerformanceObserverCxxSpec(std::move(jsInvoker)) {}
+
+void NativePerformanceObserver::startReporting(
+    jsi::Runtime &rt,
+    std::string entryType) {
+  LOG(INFO) << "Started reporting perf entry type: " << entryType;
+}
+
+void NativePerformanceObserver::stopReporting(
+    jsi::Runtime &rt,
+    std::string entryType) {
+  LOG(INFO) << "Stopped reporting perf entry type: " << entryType;
+}
+
+std::vector<RawPerformanceEntry> NativePerformanceObserver::getPendingEntries(
+    jsi::Runtime &rt) {
+  return std::vector<RawPerformanceEntry>{};
+}
+
+void NativePerformanceObserver::setOnPerformanceEntryCallback(
+    jsi::Runtime &rt,
+    std::optional<AsyncCallback<>> callback) {
+  callback_ = callback;
+  LOG(INFO) << "setOnPerformanceEntryCallback: "
+            << (callback ? "non-empty" : "empty");
+}
+
+} // namespace facebook::react