[es6] do not add caller/arguments to ES6 function definitions

src/messages.js

Index: src/messages.js
diff --git a/src/messages.js b/src/messages.js
index 95110bb95e2c82b5f4802190f17de5968dc56826..b29d98f42c7d246e76ded128c40ace8d3fc89e08 100644
--- a/src/messages.js
+++ b/src/messages.js
@@ -162,6 +162,7 @@ var kMessages = {
   strict_function:               ["In strict mode code, functions can only be declared at top level or immediately within another function." ],
   strict_read_only_property:     ["Cannot assign to read only property '", "%0", "' of ", "%1"],
   strict_cannot_assign:          ["Cannot assign to read only '", "%0", "' in strict mode"],
+  restricted_function_properties: ["'caller' and 'arguments' are restricted function properties and cannot be accessed in this context."],
   strict_poison_pill:            ["'caller', 'callee', and 'arguments' properties may not be accessed on strict mode functions or the arguments objects for calls to them"],
   strict_caller:                 ["Illegal access to a strict mode caller function."],
   strong_ellision:               ["In strong mode, arrays with holes are deprecated, use maps instead"],
@@ -180,7 +181,6 @@ var kMessages = {
   strong_constructor_return_misplaced: ["In strong mode, returning from a constructor before its super constructor invocation is deprecated"],
   sloppy_lexical:                ["Block-scoped declarations (let, const, function, class) not yet supported outside strict mode"],
   malformed_arrow_function_parameter_list: ["Malformed arrow function parameter list"],
-  generator_poison_pill:         ["'caller' and 'arguments' properties may not be accessed on generator functions."],
   cant_prevent_ext_external_array_elements: ["Cannot prevent extension of an object with external array elements"],
   redef_external_array_element:  ["Cannot redefine a property of an object with external array elements"],
   const_assign:                  ["Assignment to constant variable."],