Remove redundant checks for hasOwnProperty being defined

LayoutTests/http/tests/inspector-protocol/resources/protocol-test.html

 <!--
 Copyright (C) 2012 Samsung Electronics. All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions
 are met:
 
 1.  Redistributions of source code must retain the above copyright
     notice, this list of conditions and the following disclaimer.
 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 183 matching lines @@
     function dumpProperties(object, prefix, firstLinePrefix)
     {
         prefix = prefix || "";
         firstLinePrefix = firstLinePrefix || prefix;
         lines.push(firstLinePrefix + "{");
 
         var propertyNames = Object.keys(object);
         propertyNames.sort();
         for (var i = 0; i < propertyNames.length; ++i) {
             var name = propertyNames[i];
-            if (typeof object.hasOwnProperty === "function" && !object.hasOwnProperty(name))
+            if (!object.hasOwnProperty(name))
                 continue;
             var prefixWithName = "    " + prefix + name + " : ";
             dumpValue(object[name], "    " + prefix, prefixWithName);
         }
         lines.push(prefix + "}");
     }
 
     function dumpItems(object, prefix, firstLinePrefix)
     {
         prefix = prefix || "";
@@ skipping 102 matching lines @@
 function enableInspectorAgent()
 {
     InspectorTest.sendCommand("Inspector.enable", { });
 }
 
 window.addEventListener("load", enableInspectorAgent, false);
 
 </script>
 </head>
 </html>