Add 'error' parameter to 'window.onerror' handlers.

Source/bindings/scripts/deprecated_code_generator_v8.pm

Index: Source/bindings/scripts/deprecated_code_generator_v8.pm
diff --git a/Source/bindings/scripts/deprecated_code_generator_v8.pm b/Source/bindings/scripts/deprecated_code_generator_v8.pm
index 5495d3fdae5319177ac9bb34f617c2055d460fed..c03bda106fd778fc39960501c8f5d0811bd25af2 100644
--- a/Source/bindings/scripts/deprecated_code_generator_v8.pm
+++ b/Source/bindings/scripts/deprecated_code_generator_v8.pm
@@ -2616,9 +2616,13 @@ sub GenerateEventConstructor
     my $v8ClassName = GetV8ClassName($interface);
 
     my @anyAttributeNames;
+    my @serializableAnyAttributeNames;
     foreach my $attribute (@{$interface->attributes}) {
         if ($attribute->type eq "any") {
             push(@anyAttributeNames, $attribute->name);
+            if (!$attribute->extendedAttributes->{"Unserializable"}) {
+                push(@serializableAnyAttributeNames, $attribute->name);
+            }
         }
     }
 
@@ -2661,12 +2665,12 @@ END
     RefPtr<${implClassName}> event = ${implClassName}::create(type, eventInit);
 END
 
-    if (@anyAttributeNames) {
+    if (@serializableAnyAttributeNames) {
         # If we're in an isolated world, create a SerializedScriptValue and store it in the event for
         # later cloning if the property is accessed from another world.
         # The main world case is handled lazily (in Custom code).
         $implementation{nameSpaceInternal}->add("    if (isolatedWorldForIsolate(args.GetIsolate())) {\n");
-        foreach my $attrName (@anyAttributeNames) {
+        foreach my $attrName (@serializableAnyAttributeNames) {
             my $setter = "setSerialized" . FirstLetterToUpperCase($attrName);
             $implementation{nameSpaceInternal}->add(<<END);
         if (!${attrName}.IsEmpty())