[es6] Re-implement rest parameters via desugaring.

src/runtime/runtime.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_RUNTIME_RUNTIME_H_
 #define V8_RUNTIME_RUNTIME_H_
 
 #include "src/allocation.h"
 #include "src/objects.h"
 #include "src/unicode.h"
@@ skipping 526 matching lines @@
   F(ThrowConstAssignError, 0, 1)                             \
   F(DeclareGlobals, 2, 1)                                    \
   F(InitializeVarGlobal, 3, 1)                               \
   F(InitializeConstGlobal, 2, 1)                             \
   F(DeclareLookupSlot, 2, 1)                                 \
   F(DeclareReadOnlyLookupSlot, 2, 1)                         \
   F(InitializeLegacyConstLookupSlot, 3, 1)                   \
   F(NewArguments, 1, 1) /* TODO(turbofan): Only temporary */ \
   F(NewSloppyArguments, 3, 1)                                \
   F(NewStrictArguments, 3, 1)                                \
-  F(NewRestParam, 4, 1)                                      \
-  F(NewRestParamSlow, 2, 1)                                  \
   F(NewClosureFromStubFailure, 1, 1)                         \
   F(NewClosure, 3, 1)                                        \
   F(NewScriptContext, 2, 1)                                  \
   F(NewFunctionContext, 1, 1)                                \
   F(PushWithContext, 2, 1)                                   \
   F(PushCatchContext, 3, 1)                                  \
   F(PushBlockContext, 2, 1)                                  \
   F(IsJSModule, 1, 1)                                        \
   F(PushModuleContext, 2, 1)                                 \
   F(DeclareModules, 1, 1)                                    \
@@ skipping 654 matching lines @@
 inline bool Runtime::AtomicIsLockFree(uint32_t size) {
   return size == 1 || size == 2 || size == 4;
 }
 
 #endif
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_RUNTIME_RUNTIME_H_