Merge bleeding edge up to 8774 into the GC branch.

src/apinatives.js

Index: src/apinatives.js
===================================================================
--- src/apinatives.js	(revision 8778)
+++ src/apinatives.js	(working copy)
@@ -73,14 +73,10 @@
       if (name) %FunctionSetName(fun, name);
       cache[serialNumber] = fun;
       var prototype = %GetTemplateField(data, kApiPrototypeTemplateOffset);
-      var attributes = %GetTemplateField(data, kApiPrototypeAttributesOffset);
-      if (attributes != NONE) {
-        %IgnoreAttributesAndSetProperty(
-            fun, "prototype",
-            prototype ? Instantiate(prototype) : {},
-            attributes);
-      } else {
-        fun.prototype = prototype ? Instantiate(prototype) : {};
+      var flags = %GetTemplateField(data, kApiFlagOffset);
+      fun.prototype = prototype ? Instantiate(prototype) : {};
+      if (flags & (1 << kReadOnlyPrototypeBit)) {
+        %FunctionSetReadOnlyPrototype(fun);
       }
       %SetProperty(fun.prototype, "constructor", fun, DONT_ENUM);
       var parent = %GetTemplateField(data, kApiParentTemplateOffset);