[es6] re-implement rest parameters via desugaring

src/ast-value-factory.h

 // Copyright 2014 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 238 matching lines @@
   F(default, "default")                                                    \
   F(done, "done")                                                          \
   F(dot, ".")                                                              \
   F(dot_for, ".for")                                                       \
   F(dot_generator, ".generator")                                           \
   F(dot_generator_object, ".generator_object")                             \
   F(dot_iterator, ".iterator")                                             \
   F(dot_module, ".module")                                                 \
   F(dot_result, ".result")                                                 \
   F(empty, "")                                                             \
+  /* TODO(@caitp): get rid of these and use Array literals. */             \
+  F(empty_array, "$createEmptyArray")                                      \
+  F(strong_empty_array, "$createStrongEmptyArray")                         \
   F(eval, "eval")                                                          \
   F(get_template_callsite, "$getTemplateCallSite")                         \
   F(initialize_const_global, "initializeConstGlobal")                      \
   F(initialize_var_global, "initializeVarGlobal")                          \
   F(is_construct_call, "_IsConstructCall")                                 \
   F(is_spec_object, "_IsSpecObject")                                       \
+  F(length, "length")                                                      \
   F(let, "let")                                                            \
   F(make_reference_error, "MakeReferenceError")                            \
   F(make_syntax_error, "MakeSyntaxError")                                  \
   F(make_type_error, "MakeTypeError")                                      \
   F(native, "native")                                                      \
   F(new_target, "new.target")                                              \
   F(next, "next")                                                          \
   F(proto, "__proto__")                                                    \
   F(prototype, "prototype")                                                \
   F(reflect_apply, "$reflectApply")                                        \
@@ skipping 103 matching lines @@
 #define F(name) AstValue* name##_;
   OTHER_CONSTANTS(F)
 #undef F
 };
 } }  // namespace v8::internal
 
 #undef STRING_CONSTANTS
 #undef OTHER_CONSTANTS
 
 #endif  // V8_AST_VALUE_FACTORY_H_