Submit Object.getOwnPropertyNames patch by Pavel Feldman. See http://codereview.chromium.org/549050.

src/v8natives.js

Index: src/v8natives.js
diff --git a/src/v8natives.js b/src/v8natives.js
index 700b9e47e78f6c4d35f2cfe1c4089970eacf3071..3dcf430b8eeccfab1f6c9739084eb536dd0959bf 100644
--- a/src/v8natives.js
+++ b/src/v8natives.js
@@ -276,7 +276,7 @@ function ObjectLookupSetter(name) {
 
 function ObjectKeys(obj) {
   if ((!IS_OBJECT(obj) || IS_NULL_OR_UNDEFINED(obj)) && !IS_FUNCTION(obj))
-    throw MakeTypeError('object_keys_non_object', [obj]);
+    throw MakeTypeError("obj_ctor_property_non_object", ["keys"]);
   return %LocalKeys(obj);
 }
 
@@ -493,23 +493,59 @@ function DefineOwnProperty(obj, p, desc, should_throw) {
 
 // ES5 section 15.2.3.2.
 function ObjectGetPrototypeOf(obj) {
- if (!IS_OBJECT(obj) && !IS_FUNCTION(obj)) {
-   throw MakeTypeError("object_get_prototype_non_object", [obj]);
- }
- return obj.__proto__;
+  if ((!IS_OBJECT(obj) || IS_NULL_OR_UNDEFINED(obj)) && !IS_FUNCTION(obj))
+    throw MakeTypeError("obj_ctor_property_non_object", ["getPrototypeOf"]);
+  return obj.__proto__;
 }
 
 
 // ES5 section 15.2.3.3 
 function ObjectGetOwnPropertyDescriptor(obj, p) {
-  if (!IS_OBJECT(obj) && !IS_FUNCTION(obj)) {
-    throw MakeTypeError("object_get_prototype_non_object", [obj]);
-  }
+  if ((!IS_OBJECT(obj) || IS_NULL_OR_UNDEFINED(obj)) && !IS_FUNCTION(obj))
+    throw MakeTypeError("obj_ctor_property_non_object", ["getOwnPropertyDescriptor"]);
   var desc = GetOwnProperty(obj, p);
   return FromPropertyDescriptor(desc);
 }
 
 
+// ES5 section 15.2.3.4.
+function ObjectGetOwnPropertyNames(obj) {
+  if ((!IS_OBJECT(obj) || IS_NULL_OR_UNDEFINED(obj)) && !IS_FUNCTION(obj))
+    throw MakeTypeError("obj_ctor_property_non_object", ["getOwnPropertyNames"]);
+
+  // Find all the indexed properties.
+
+  // Get the local element names.
+  var propertyNames = %GetLocalElementNames(obj);
+
+  // Get names for indexed interceptor properties.
+  if (%GetInterceptorInfo(obj) & 1) {
+    var indexedInterceptorNames =
+        %GetIndexedInterceptorElementNames(obj);
+    if (indexedInterceptorNames) {
+      propertyNames = propertyNames.concat(indexedInterceptorNames);
+    }
+  }
+
+  // Find all the named properties.
+
+  // Get the local property names.
+  propertyNames = propertyNames.concat(%GetLocalPropertyNames(obj));
+
+  // Get names for named interceptor properties if any.
+
+  if (%GetInterceptorInfo(obj) & 2) {
+    var namedInterceptorNames =
+        %GetNamedInterceptorPropertyNames(obj);
+    if (namedInterceptorNames) {
+      propertyNames = propertyNames.concat(namedInterceptorNames);
+    }
+  }
+
+  return propertyNames;
+}
+
+
 // ES5 section 15.2.3.5.
 function ObjectCreate(proto, properties) {
   if (!IS_OBJECT(proto) && !IS_NULL(proto)) {
@@ -576,7 +612,8 @@ function SetupObject() {
     "keys", ObjectKeys,
     "create", ObjectCreate,
     "getPrototypeOf", ObjectGetPrototypeOf,
-    "getOwnPropertyDescriptor", ObjectGetOwnPropertyDescriptor
+    "getOwnPropertyDescriptor", ObjectGetOwnPropertyDescriptor,
+    "getOwnPropertyNames", ObjectGetOwnPropertyNames
   ));
 }