Add object hidden properties to heap snapshot

test/cctest/test-heap-profiler.cc

Index: test/cctest/test-heap-profiler.cc
diff --git a/test/cctest/test-heap-profiler.cc b/test/cctest/test-heap-profiler.cc
index c04ed9de13bee42711db470fee3ea1fbcb5b0d3a..7758fdc066cb51c597fcdd544844f1653be4d3ed 100644
--- a/test/cctest/test-heap-profiler.cc
+++ b/test/cctest/test-heap-profiler.cc
@@ -2477,3 +2477,29 @@ TEST(BoxObject) {
       GetProperty(box_node, v8::HeapGraphEdge::kInternal, "value");
   CHECK_NE(NULL, box_value);
 }
+
+
+TEST(JSObjectHiddenProperty) {
+  LocalContext env;
+  v8::Isolate* isolate = env->GetIsolate();
+  v8::HandleScope handle_scope(isolate);
+  v8::HeapProfiler* heap_profiler = isolate->GetHeapProfiler();
+
+  v8::Local<v8::Object> an_object = v8::Object::New(isolate);
+  env->Global()->Set(v8_str("an_object"), an_object);
+  CHECK(an_object->SetHiddenValue(v8_str("hidden_key"),
+                                  v8_str("hidden_value")));
+
+  const v8::HeapSnapshot* snapshot =
+      heap_profiler->TakeHeapSnapshot(v8_str("snapshot"));
+  CHECK(ValidateSnapshot(snapshot));
+  const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
+  const v8::HeapGraphNode* object_node =
+      GetProperty(global, v8::HeapGraphEdge::kProperty, "an_object");
+  CHECK_NE(NULL, object_node);
+  const v8::HeapGraphNode* hidden_node =
+      GetProperty(object_node, v8::HeapGraphEdge::kProperty, "hidden_key");
+  CHECK_NE(NULL, hidden_node);
+  CHECK_EQ(v8::String::NewFromUtf8(env->GetIsolate(), "hidden_value"),
+           hidden_node->GetName());
+}