[runtime] [proxy] Runtime_HasOwnProperty and thus

Object.prototype.hasOwnProperty should use JSReceiver::HasOwnProperty for
proxies.

BUG=v8:1543
LOG=N

Review URL: https://codereview.chromium.org/1480213004

Cr-Commit-Position: refs/heads/master@{#32475}

src/js/v8natives.js

@@ -183,18 +183,10 @@ function ObjectValueOf() {
 }
 
 
-// ECMA-262 - 15.2.4.5
+// ES6 7.3.11
 function ObjectHasOwnProperty(value) {
   var name = TO_NAME(value);
   var object = TO_OBJECT(this);
-
-  if (%_IsJSProxy(object)) {
-    // TODO(rossberg): adjust once there is a story for symbols vs proxies.
-    if (IS_SYMBOL(value)) return false;
-
-    var handler = %GetHandler(object);
-    return CallTrap1(handler, "hasOwn", ProxyDerivedHasOwnTrap, name);
-  }
   return %HasOwnProperty(object, name);
 }
 

src/runtime/runtime-object.cc

@@ -719,6 +719,11 @@ RUNTIME_FUNCTION(Runtime_HasOwnProperty) {
     if (index < static_cast<uint32_t>(string->length())) {
       return isolate->heap()->true_value();
     }
+  } else if (object->IsJSProxy()) {
+    Maybe<bool> result =
+        JSReceiver::HasOwnProperty(Handle<JSProxy>::cast(object), key);
+    if (!result.IsJust()) return isolate->heap()->exception();
+    return isolate->heap()->ToBoolean(result.FromJust());
   }
   return isolate->heap()->false_value();
 }

test/mjsunit/harmony/proxies-has-own-property.js

+// Copyright 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --harmony-proxies
+
+var handler = {};
+var target = {a:1};
+var proxy = new Proxy(target, handler);
+
+assertTrue(target.hasOwnProperty('a'));
+assertTrue(proxy.hasOwnProperty('a'));
+assertFalse(target.hasOwnProperty('b'));
+assertFalse(proxy.hasOwnProperty('b'));
+
+
+handler.has = function() {
+  return false;
+}
+assertTrue(target.hasOwnProperty('a'));
+assertFalse(proxy.hasOwnProperty('a'));
+assertFalse(target.hasOwnProperty('b'));
+assertFalse(proxy.hasOwnProperty('b'));
+
+handler.has = function() {
+  return true;
+}
+assertTrue(target.hasOwnProperty('a'));
+assertTrue(proxy.hasOwnProperty('a'));
+assertFalse(target.hasOwnProperty('b'));
+assertTrue(proxy.hasOwnProperty('b'));
+
+handler.has = function() {
+  throw Error();
+}
+assertTrue(target.hasOwnProperty('a'));
+assertThrows(function(){ proxy.hasOwnProperty('a') }, Error);
+assertFalse(target.hasOwnProperty('b'));
+assertThrows(function(){ proxy.hasOwnProperty('b') }, Error);