Add workaround for redefinition of __proto__ property.

src/bootstrapper.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 475 matching lines @@
 
     // Allocate a new prototype for the object function.
     Handle<Map> object_prototype_map =
         factory->NewMap(JS_OBJECT_TYPE, JSObject::kHeaderSize);
     Handle<DescriptorArray> prototype_descriptors(
         factory->NewDescriptorArray(0, 1));
     DescriptorArray::WhitenessWitness witness(*prototype_descriptors);
 
     Handle<Foreign> object_prototype(
         factory->NewForeign(&Accessors::ObjectPrototype));
-    PropertyAttributes attribs = static_cast<PropertyAttributes>(
-        DONT_ENUM | DONT_DELETE);
+    PropertyAttributes attribs = static_cast<PropertyAttributes>(DONT_ENUM);
     object_prototype_map->set_instance_descriptors(*prototype_descriptors);
 
     {  // Add __proto__.
       CallbacksDescriptor d(heap->proto_string(), *object_prototype, attribs);
       object_prototype_map->AppendDescriptor(&d, witness);
     }
 
     Handle<JSObject> prototype = factory->NewJSObjectFromMap(
         object_prototype_map,
         TENURED);
@@ skipping 1980 matching lines @@
   return from + sizeof(NestingCounterType);
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   ASSERT(!IsActive());
 }
 
 } }  // namespace v8::internal