Revert "Make instanceof and Object.getPrototypeOf work for proxies, plus a few other tweaks."

src/v8natives.js

Index: src/v8natives.js
diff --git a/src/v8natives.js b/src/v8natives.js
index a5627c8cf35fd93a93eb549a3fe7ad4cad10aeef..469059ba21a3981a8e1c6b9d5e9db057f74f098d 100644
--- a/src/v8natives.js
+++ b/src/v8natives.js
@@ -336,7 +336,6 @@ function IsInconsistentDescriptor(desc) {
   return IsAccessorDescriptor(desc) && IsDataDescriptor(desc);
 }
 
-
 // ES5 8.10.4
 function FromPropertyDescriptor(desc) {
   if (IS_UNDEFINED(desc)) return desc;
@@ -400,23 +399,6 @@ function ToPropertyDescriptor(obj) {
 }
 
 
-// For Harmony proxies.
-function ToCompletePropertyDescriptor(obj) {
-  var desc = ToPropertyDescriptor(obj)
-  if (IsGenericDescriptor(desc) || IsDataDescriptor(desc)) {
-    if (!("value" in desc)) desc.value = void 0;
-    if (!("writable" in desc)) desc.writable = false;
-  } else {
-    // Is accessor descriptor.
-    if (!("get" in desc)) desc.get = void 0;
-    if (!("set" in desc)) desc.set = void 0;
-  }
-  if (!("enumerable" in desc)) desc.enumerable = false;
-  if (!("configurable" in desc)) desc.configurable = false;
-  return desc;
-}
-
-
 function PropertyDescriptor() {
   // Initialize here so they are all in-object and have the same map.
   // Default values from ES5 8.6.1.
@@ -565,25 +547,9 @@ function ConvertDescriptorArrayToDescriptor(desc_array) {
 
 // ES5 section 8.12.2.
 function GetProperty(obj, p) {
-  if (%IsJSProxy(obj)) {
-    var handler = %GetHandler(obj);
-    var getProperty = handler.getPropertyDescriptor;
-    if (IS_UNDEFINED(getProperty)) {
-      throw MakeTypeError("handler_trap_missing",
-                          [handler, "getPropertyDescriptor"]);
-    }
-    var descriptor = getProperty.call(handler, p);
-    if (IS_UNDEFINED(descriptor)) return descriptor;
-    var desc = ToCompletePropertyDescriptor(descriptor);
-    if (!desc.configurable) {
-      throw MakeTypeError("proxy_prop_not_configurable",
-                          [handler, "getPropertyDescriptor", p, descriptor]);
-    }
-    return desc;
-  }
   var prop = GetOwnProperty(obj);
   if (!IS_UNDEFINED(prop)) return prop;
-  var proto = %GetPrototype(obj);
+  var proto = obj.__proto__;
   if (IS_NULL(proto)) return void 0;
   return GetProperty(proto, p);
 }
@@ -591,12 +557,6 @@ function GetProperty(obj, p) {
 
 // ES5 section 8.12.6
 function HasProperty(obj, p) {
-  if (%IsJSProxy(obj)) {
-    var handler = %GetHandler(obj)
-    var has = handler.has
-    if (IS_UNDEFINED(has)) has = DerivedHasTrap
-    return ToBoolean(has.call(handler, obj, p))
-  }
   var desc = GetProperty(obj, p);
   return IS_UNDEFINED(desc) ? false : true;
 }
@@ -785,7 +745,7 @@ function DefineOwnProperty(obj, p, desc, should_throw) {
 function ObjectGetPrototypeOf(obj) {
   if (!IS_SPEC_OBJECT(obj))
     throw MakeTypeError("obj_ctor_property_non_object", ["getPrototypeOf"]);
-  return %GetPrototype(obj);
+  return obj.__proto__;
 }
 
 
@@ -798,43 +758,11 @@ function ObjectGetOwnPropertyDescriptor(obj, p) {
 }
 
 
-// For Harmony proxies
-function ToStringArray(obj, trap) {
-  if (!IS_SPEC_OBJECT(obj)) {
-    throw MakeTypeError("proxy_non_object_prop_names", [obj, trap]);
-  }
-  var n = ToUint32(obj.length);
-  var array = new $Array(n);
-  var names = {}
-  for (var index = 0; index < n; index++) {
-    var s = ToString(obj[index]);
-    if (s in names) {
-      throw MakeTypeError("proxy_repeated_prop_name", [obj, trap, s])
-    }
-    array[index] = s;
-    names.s = 0;
-  }
-  return array;
-}
-
-
 // ES5 section 15.2.3.4.
 function ObjectGetOwnPropertyNames(obj) {
   if (!IS_SPEC_OBJECT(obj))
     throw MakeTypeError("obj_ctor_property_non_object", ["getOwnPropertyNames"]);
 
-  // Special handling for proxies.
-  if (%IsJSProxy(obj)) {
-    var handler = %GetHandler(obj);
-    var getOwnPropertyNames = handler.getOwnPropertyNames;
-    if (IS_UNDEFINED(getOwnPropertyNames)) {
-      throw MakeTypeError("handler_trap_missing",
-                          [handler, "getOwnPropertyNames"]);
-    }
-    var names = getOwnPropertyNames.call(handler);
-    return ToStringArray(names, "getOwnPropertyNames");
-  }
-
   // Find all the indexed properties.
 
   // Get the local element names.