[turbofan] Remove special JSForInStep and JSForInDone.

src/compiler/js-generic-lowering.cc

 // Copyright 2014 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.
 
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/js-generic-lowering.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/machine-operator.h"
@@ skipping 556 matching lines @@
   NodeProperties::ChangeOp(node, common()->Call(desc));
 }
 
 
 void JSGenericLowering::LowerJSCallRuntime(Node* node) {
   const CallRuntimeParameters& p = CallRuntimeParametersOf(node->op());
   ReplaceWithRuntimeCall(node, p.id(), static_cast<int>(p.arity()));
 }
 
 
-void JSGenericLowering::LowerJSForInDone(Node* node) {
-  ReplaceWithRuntimeCall(node, Runtime::kForInDone);
-}
-
-
 void JSGenericLowering::LowerJSForInNext(Node* node) {
   ReplaceWithRuntimeCall(node, Runtime::kForInNext);
 }
 
 
 void JSGenericLowering::LowerJSForInPrepare(Node* node) {
   ReplaceWithRuntimeCall(node, Runtime::kForInPrepare);
 }
 
-
-void JSGenericLowering::LowerJSForInStep(Node* node) {
-  ReplaceWithRuntimeCall(node, Runtime::kForInStep);
-}
-
-
 void JSGenericLowering::LowerJSLoadMessage(Node* node) {
   ExternalReference message_address =
       ExternalReference::address_of_pending_message_obj(isolate());
   node->RemoveInput(NodeProperties::FirstContextIndex(node));
   node->InsertInput(zone(), 0, jsgraph()->ExternalConstant(message_address));
   node->InsertInput(zone(), 1, jsgraph()->IntPtrConstant(0));
   NodeProperties::ChangeOp(node, machine()->Load(MachineType::AnyTagged()));
 }
 
 
@@ skipping 77 matching lines @@
 }
 
 
 MachineOperatorBuilder* JSGenericLowering::machine() const {
   return jsgraph()->machine();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8