[es6] re-implement rest parameters via desugaring

src/ia32/full-codegen-ia32.cc

Index: src/ia32/full-codegen-ia32.cc
diff --git a/src/ia32/full-codegen-ia32.cc b/src/ia32/full-codegen-ia32.cc
index 6615af177b5937529ef71ea875605154297015c6..0ff46f95ff70e8cf79972608a23763f46fa59614 100644
--- a/src/ia32/full-codegen-ia32.cc
+++ b/src/ia32/full-codegen-ia32.cc
@@ -277,28 +277,6 @@ void FullCodeGenerator::Generate() {
   }
 
 
-  // Possibly allocate RestParameters
-  int rest_index;
-  Variable* rest_param = scope()->rest_parameter(&rest_index);
-  if (rest_param) {
-    Comment cmnt(masm_, "[ Allocate rest parameter array");
-
-    int num_parameters = info->scope()->num_parameters();
-    int offset = num_parameters * kPointerSize;
-
-    __ lea(edx,
-           Operand(ebp, StandardFrameConstants::kCallerSPOffset + offset));
-    __ push(edx);
-    __ push(Immediate(Smi::FromInt(num_parameters)));
-    __ push(Immediate(Smi::FromInt(rest_index)));
-    __ push(Immediate(Smi::FromInt(language_mode())));
-
-    RestParamAccessStub stub(isolate());
-    __ CallStub(&stub);
-
-    SetVar(rest_param, eax, ebx, edx);
-  }
-
   Variable* arguments = scope()->arguments();
   if (arguments != NULL) {
     // Function uses arguments object.