Implement ES6 rest parameters

src/code-stubs.cc

Index: src/code-stubs.cc
diff --git a/src/code-stubs.cc b/src/code-stubs.cc
index b2178fbfd1beb32360214601872c2ea948c292f2..6c68271bcda53691b0a8a902f432829ec7785743 100644
--- a/src/code-stubs.cc
+++ b/src/code-stubs.cc
@@ -790,6 +790,11 @@ void ArgumentsAccessStub::Generate(MacroAssembler* masm) {
 }
 
 
+void RestParamAccessStub::Generate(MacroAssembler* masm) {
+  GenerateNew(masm);
+}
+
+
 void ArgumentsAccessStub::PrintName(std::ostream& os) const {  // NOLINT
   os << "ArgumentsAccessStub_";
   switch (type()) {
@@ -810,6 +815,11 @@ void ArgumentsAccessStub::PrintName(std::ostream& os) const {  // NOLINT
 }
 
 
+void RestParamAccessStub::PrintName(std::ostream& os) const {  // NOLINT
+  os << "RestParamAccessStub_";
+}
+
+
 void CallFunctionStub::PrintName(std::ostream& os) const {  // NOLINT
   os << "CallFunctionStub_Args" << argc();
 }