Made function prototype property DontEnum for compatibility with

src/bootstrapper.cc

 // Copyright 2006-2008 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 456 matching lines @@
   // Allocate the message listeners object.
   v8::NeanderArray listeners;
   global_context()->set_message_listeners(*listeners.value());
 
   // Allocate the map for function instances.
   Handle<Map> fm = Factory::NewMap(JS_FUNCTION_TYPE, JSFunction::kSize);
   global_context()->set_function_instance_map(*fm);
   // Please note that the prototype property for function instances must be
   // writable.
   Handle<DescriptorArray> function_map_descriptors =
-      ComputeFunctionInstanceDescriptor(false, true);
+      ComputeFunctionInstanceDescriptor(false, false);
   fm->set_instance_descriptors(*function_map_descriptors);
 
   // Allocate the function map first and then patch the prototype later
   fm = Factory::NewMap(JS_FUNCTION_TYPE, JSFunction::kSize);
   global_context()->set_function_map(*fm);
   function_map_descriptors = ComputeFunctionInstanceDescriptor(true);
   fm->set_instance_descriptors(*function_map_descriptors);
 
   Handle<String> object_name = Handle<String>(Heap::Object_symbol());
 
@@ skipping 1110 matching lines @@
 }
 
 
 // Restore statics that are thread local.
 char* Genesis::RestoreState(char* from) {
   current_ = *reinterpret_cast<Genesis**>(from);
   return from + sizeof(current_);
 }
 
 } }  // namespace v8::internal