Add object hidden properties to heap snapshot

test/cctest/test-heap-profiler.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2459 matching lines @@
   const v8::HeapGraphNode* global_node = GetGlobalObject(snapshot);
   const v8::HeapGraphNode* box_node =
       GetProperty(global_node, v8::HeapGraphEdge::kElement, "0");
   CHECK_NE(NULL, box_node);
   v8::String::Utf8Value box_node_name(box_node->GetName());
   CHECK_EQ("system / Box", *box_node_name);
   const v8::HeapGraphNode* box_value =
       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());
+}