[proxies] Fix HasProperty and getOwnPropertySymbols

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index e1e3e48f9b5c1e847a6b650ea1ecdd88118cef8d..b02a2f152d7e1708156b220f283acae816d6caff 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -292,9 +292,9 @@ bool Object::FilterKey(PropertyFilter filter) {
   if (IsSymbol()) {
     if (filter & SKIP_SYMBOLS) return true;
     if (Symbol::cast(this)->is_private()) return true;
+  } else {
+    if (filter & SKIP_STRINGS) return true;
   }
-  if ((filter & SKIP_STRINGS) && !IsSymbol()) return true;
-
   return false;
 }