Only create arguments-maps in the bootstrapper, remove now obsolete ValueType flag.

src/builtins.cc

Index: src/builtins.cc
diff --git a/src/builtins.cc b/src/builtins.cc
index 28c4a7829c3c586b48d65084b35ae21587903f8b..e94c730d9ae2065271d8d98c38630a94af3bd0c1 100644
--- a/src/builtins.cc
+++ b/src/builtins.cc
@@ -644,7 +644,7 @@ BUILTIN(ArraySlice) {
       // Array.slice(arguments, ...) is quite a common idiom (notably more
       // than 50% of invocations in Web apps).  Treat it in C++ as well.
       Map* arguments_map = isolate->context()->native_context()->
-          sloppy_arguments_boilerplate()->map();
+          sloppy_arguments_map();

[Igor Sheludko, 2014/07/02 14:17:14]

While we are here: isolate()->sloppy_arguments_map()

 
       bool is_arguments_object_with_fast_elements =
           receiver->IsJSObject() &&