Add GetOwnPropertyNames method for Object in the API

src/api.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 2745 matching lines @@
   // Because we use caching to speed up enumeration it is important
   // to never change the result of the basic enumeration function so
   // we clone the result.
   i::Handle<i::FixedArray> elms = isolate->factory()->CopyFixedArray(value);
   i::Handle<i::JSArray> result =
       isolate->factory()->NewJSArrayWithElements(elms);
   return Utils::ToLocal(scope.CloseAndEscape(result));
 }
 
 
+Local<Array> v8::Object::GetOwnPropertyNames() {
+  i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
+  ON_BAILOUT(isolate, "v8::Object::GetOwnPropertyNames()",
+             return Local<v8::Array>());
+  ENTER_V8(isolate);
+  i::HandleScope scope(isolate);
+  i::Handle<i::JSObject> self = Utils::OpenHandle(this);
+  i::Handle<i::FixedArray> value =
+      i::GetKeysInFixedArrayFor(self, i::LOCAL_ONLY);
+  // Because we use caching to speed up enumeration it is important
+  // to never change the result of the basic enumeration function so
+  // we clone the result.
+  i::Handle<i::FixedArray> elms = isolate->factory()->CopyFixedArray(value);
+  i::Handle<i::JSArray> result =
+      isolate->factory()->NewJSArrayWithElements(elms);
+  return Utils::ToLocal(scope.CloseAndEscape(result));
+}
+
+
 Local<String> v8::Object::ObjectProtoToString() {
   i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
   ON_BAILOUT(isolate, "v8::Object::ObjectProtoToString()",
              return Local<v8::String>());
   ENTER_V8(isolate);
   i::Handle<i::JSObject> self = Utils::OpenHandle(this);
 
   i::Handle<i::Object> name(self->class_name());
 
   // Native implementation of Object.prototype.toString (v8natives.js):
@@ skipping 3318 matching lines @@
 
 
 char* HandleScopeImplementer::Iterate(ObjectVisitor* v, char* storage) {
   HandleScopeImplementer* scope_implementer =
       reinterpret_cast<HandleScopeImplementer*>(storage);
   scope_implementer->IterateThis(v);
   return storage + ArchiveSpacePerThread();
 }
 
 } }  // namespace v8::internal