[es6] Reintroduce the instanceof operator in the backends.

src/compiler/js-intrinsic-lowering.cc

Index: src/compiler/js-intrinsic-lowering.cc
diff --git a/src/compiler/js-intrinsic-lowering.cc b/src/compiler/js-intrinsic-lowering.cc
index bcf88d16f370a43e1aa0d798b724db195bd945b8..4805afc05d526d908f0c901256fa849e6f0edf27 100644
--- a/src/compiler/js-intrinsic-lowering.cc
+++ b/src/compiler/js-intrinsic-lowering.cc
@@ -86,8 +86,6 @@ Reduction JSIntrinsicLowering::Reduce(Node* node) {
       return ReduceNewObject(node);
     case Runtime::kInlineGetSuperConstructor:
       return ReduceGetSuperConstructor(node);
-    case Runtime::kInlineGetOrdinaryHasInstance:
-      return ReduceGetOrdinaryHasInstance(node);
     default:
       break;
   }
@@ -411,17 +409,6 @@ Reduction JSIntrinsicLowering::ReduceGetSuperConstructor(Node* node) {
                 active_function_map, effect, control);
 }
 
-Reduction JSIntrinsicLowering::ReduceGetOrdinaryHasInstance(Node* node) {
-  Node* effect = NodeProperties::GetEffectInput(node);
-  Node* context = NodeProperties::GetContextInput(node);
-  Node* native_context = effect = graph()->NewNode(
-      javascript()->LoadContext(0, Context::NATIVE_CONTEXT_INDEX, true),
-      context, context, effect);
-  return Change(node, javascript()->LoadContext(
-                          0, Context::ORDINARY_HAS_INSTANCE_INDEX, true),
-                native_context, context, effect);
-}
-
 Reduction JSIntrinsicLowering::Change(Node* node, const Operator* op, Node* a,
                                       Node* b) {
   RelaxControls(node);