Avoid jumping to the runtime for ForInFilter

src/runtime/runtime-forin.cc

Index: src/runtime/runtime-forin.cc
diff --git a/src/runtime/runtime-forin.cc b/src/runtime/runtime-forin.cc
index 916ff17a9ebfd2c13083f82e25701549d209f0bd..48ddebb672089b2337eceeea0156d8c314815b28 100644
--- a/src/runtime/runtime-forin.cc
+++ b/src/runtime/runtime-forin.cc
@@ -101,11 +101,6 @@ MaybeHandle<Object> HasEnumerableProperty(Isolate* isolate,
   return isolate->factory()->undefined_value();
 }
 
-MaybeHandle<Object> Filter(Handle<JSReceiver> receiver, Handle<Object> key) {
-  Isolate* const isolate = receiver->GetIsolate();
-  return HasEnumerableProperty(isolate, receiver, key);
-}
-
 }  // namespace
 
 
@@ -157,13 +152,24 @@ RUNTIME_FUNCTION(Runtime_ForInDone) {
   return isolate->heap()->ToBoolean(index == length);
 }
 
+RUNTIME_FUNCTION(Runtime_ForInHasProperty) {
+  HandleScope scope(isolate);
+  DCHECK_EQ(2, args.length());
+  CONVERT_ARG_HANDLE_CHECKED(JSReceiver, receiver, 0);
+  CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
+  Handle<Object> result;
+  ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
+      isolate, result, HasEnumerableProperty(isolate, receiver, key));
+  return isolate->heap()->ToBoolean(!result->IsUndefined(isolate));
+}
 
 RUNTIME_FUNCTION(Runtime_ForInFilter) {
   HandleScope scope(isolate);
   DCHECK_EQ(2, args.length());
   CONVERT_ARG_HANDLE_CHECKED(JSReceiver, receiver, 0);
   CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
-  RETURN_RESULT_OR_FAILURE(isolate, Filter(receiver, key));
+  RETURN_RESULT_OR_FAILURE(isolate,
+                           HasEnumerableProperty(isolate, receiver, key));
 }
 
 
@@ -179,7 +185,8 @@ RUNTIME_FUNCTION(Runtime_ForInNext) {
   if (receiver->map() == *cache_type) {
     return *key;
   }
-  RETURN_RESULT_OR_FAILURE(isolate, Filter(receiver, key));
+  RETURN_RESULT_OR_FAILURE(isolate,
+                           HasEnumerableProperty(isolate, receiver, key));
 }