[api] Expose ES6 7.3.14 SetIntegrityLevel on v8::Object

test/cctest/test-api.cc

Index: test/cctest/test-api.cc
diff --git a/test/cctest/test-api.cc b/test/cctest/test-api.cc
index 6bea3eaefee603ed7bc02a56be251082ba6ad27a..d06cd7e7c1f13aceabc30badd25be5844cf6a45f 100644
--- a/test/cctest/test-api.cc
+++ b/test/cctest/test-api.cc
@@ -24985,3 +24985,21 @@ TEST(MemoryPressure) {
   isolate->MemoryPressureNotification(v8::MemoryPressureLevel::kNone);
   CHECK(!CcTest::i_isolate()->heap()->ShouldOptimizeForMemoryUsage());
 }
+
+TEST(SetIntegrityLevel) {
+  LocalContext context;
+  v8::Isolate* isolate = CcTest::isolate();
+  v8::HandleScope scope(isolate);
+
+  v8::Local<v8::Object> obj = v8::Object::New(isolate);
+  CHECK(context->Global()->Set(context.local(), v8_str("o"), obj).FromJust());
+
+  v8::Local<v8::Value> is_frozen = CompileRun("Object.isFrozen(o)");
+  CHECK(!is_frozen->BooleanValue(context.local()).FromJust());
+
+  CHECK(obj->SetIntegrityLevel(context.local(), v8::IntegrityLevel::kFrozen)
+            .FromJust());
+
+  is_frozen = CompileRun("Object.isFrozen(o)");
+  CHECK(is_frozen->BooleanValue(context.local()).FromJust());
+}