Merge up to 8597 to experimental/gc from the bleeding edge.

src/apinatives.js

Index: src/apinatives.js
===================================================================
--- src/apinatives.js	(revision 8618)
+++ src/apinatives.js	(working copy)
@@ -73,7 +73,15 @@
       if (name) %FunctionSetName(fun, name);
       cache[serialNumber] = fun;
       var prototype = %GetTemplateField(data, kApiPrototypeTemplateOffset);
-      fun.prototype = prototype ? Instantiate(prototype) : {};
+      var attributes = %GetTemplateField(data, kApiPrototypeAttributesOffset);
+      if (attributes != NONE) {
+        %IgnoreAttributesAndSetProperty(
+            fun, "prototype",
+            prototype ? Instantiate(prototype) : {},
+            attributes);
+      } else {
+        fun.prototype = prototype ? Instantiate(prototype) : {};
+      }
       %SetProperty(fun.prototype, "constructor", fun, DONT_ENUM);
       var parent = %GetTemplateField(data, kApiParentTemplateOffset);
       if (parent) {