Global constructors should be configurable and not enumerable

LayoutTests/fast/dom/script-tests/constructed-objects-prototypes.js

 description("Make sure prototypes are set up using the window a property came from, instead of the lexical global object.")
 
 var subframe = document.createElement("iframe");
 document.body.appendChild(subframe);
 var inner = subframe.contentWindow; // Call it "inner" to make shouldBe output shorter
 
 // Stash a property on the prototypes.
 window.Object.prototype.isInner = false;
 inner.Object.prototype.isInner = true;
 
-function classNameForObject(object)
-{
-    // call will use the global object if passed null or undefined, so special case those:
-    if (object == null)
-        return null;
-    var result = Object.prototype.toString.call(object);
-    // remove '[object ' and ']'
-    return result.split(' ')[1].split(']')[0];
-}
-
-function constructorPropertiesOnWindow(globalObject)
-{
-    var constructorNames = [];
-    for (var property in globalObject) {

[arv (Not doing code reviews), 2013/04/24 15:34:08]

Can we change the loop to use Object.getOwnPropertyNames instead?

-        var value = inner[property];
-        if (value == null)
-            continue;
-        var type = classNameForObject(value);
-        // Ignore these properties because they do not exist in all implementations. They will be tested separately
-        if (type == "WebGLRenderingContextConstructor" ||
-            type == "ArrayBufferConstructor" ||
-            type =="Float32ArrayConstructor" ||
-            type =="Float64ArrayConstructor" ||
-            type =="Int8ArrayConstructor" ||
-            type =="Int16ArrayConstructor" ||
-            type =="Int32ArrayConstructor" ||
-            type =="Uint8ArrayConstructor" ||
-            type =="Uint8ClampedArrayConstructor" ||
-            type =="Uint16ArrayConstructor" ||
-            type =="Uint32ArrayConstructor" ||
-            type == "FileErrorConstructor" ||
-            type == "FileReaderConstructor" ||
-            type == "AudioContextConstructor" ||
-            type == "SpeechSynthesisUtteranceConstructor")
-            continue;
-        if (!type.match('Constructor$'))
-            continue;
-        constructorNames.push(property);
-    }
-    return constructorNames.sort();
-}
-
-var constructorNames = constructorPropertiesOnWindow(inner);
+var constructorNames = ["Image", "MediaController", "Option", "OverflowEvent", "ProgressEvent", "URL", "XMLHttpRequest"];
 
 var argumentsForConstructor = {
     'Worker' : "'foo'",
 }
 
 for (var x = 0; x < constructorNames.length; x++) {
     var constructorName = constructorNames[x];
     var arguments = argumentsForConstructor[constructorName] || "";
     var argumentsString = "(" + arguments + ")";
     // Test first to see if the object is constructable
     var constructedObject;
     try {
         constructedObject = eval("new inner." + constructorName + argumentsString);
     } catch(e) {
         continue;
     }
 
     shouldBeTrue("(new inner." + constructorName + argumentsString + ").isInner");
     shouldBeTrue("(new inner." + constructorName + argumentsString + ").constructor.isInner");
 }
 
 document.body.removeChild(subframe);