Global constructors should be configurable and not enumerable

Source/bindings/scripts/CodeGeneratorV8.pm

Index: Source/bindings/scripts/CodeGeneratorV8.pm
diff --git a/Source/bindings/scripts/CodeGeneratorV8.pm b/Source/bindings/scripts/CodeGeneratorV8.pm
index 5ecf344c1e37fbba8a55317ea5aaf65a60004362..f47cf15eb22c6c24f6add8c58c16ab88161b5893 100644
--- a/Source/bindings/scripts/CodeGeneratorV8.pm
+++ b/Source/bindings/scripts/CodeGeneratorV8.pm
@@ -2617,11 +2617,15 @@ sub GenerateSingleBatchedAttribute
     my $setterForMainWorld;
     my $propAttr = "v8::None";
 
+    my $isConstructor = ($attribute->signature->type =~ /Constructor$/);
+
     # Check attributes.
-    if ($attrExt->{"NotEnumerable"}) {
+    # As per Web IDL specification, constructor properties on the ECMAScript global object should be
+    # configurable and should not be enumerable.
+    if ($attrExt->{"NotEnumerable"} || $isConstructor) {
         $propAttr .= " | v8::DontEnum";
     }
-    if ($attrExt->{"Unforgeable"}) {
+    if ($attrExt->{"Unforgeable"} && !$isConstructor) {
         $propAttr .= " | v8::DontDelete";
     }
 
@@ -2629,7 +2633,7 @@ sub GenerateSingleBatchedAttribute
     my $data = "0 /* no data */";
 
     # Constructor
-    if ($attribute->signature->type =~ /Constructor$/) {
+    if ($isConstructor) {
         my $constructorType = $attribute->signature->type;
         $constructorType =~ s/Constructor$//;
         # $constructorType ~= /Constructor$/ indicates that it is NamedConstructor.