[proxies] Fix HasProperty and getOwnPropertySymbols

src/objects-inl.h

 // Copyright 2012 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.
 //
 // Review notes:
 //
 // - The use of macros in these inline functions may seem superfluous
 // but it is absolutely needed to make sure gcc generates optimal
 // code. gcc is not happy when attempting to inline too deep.
 //
@@ skipping 274 matching lines @@
     return Name::cast(second)->AsArrayIndex(&index) && index == expected;
   }
   return Name::cast(first)->Equals(Name::cast(second));
 }
 
 
 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;
 }
 
 
 Handle<Object> Object::NewStorageFor(Isolate* isolate,
                                      Handle<Object> object,
                                      Representation representation) {
   if (representation.IsSmi() && object->IsUninitialized()) {
     return handle(Smi::FromInt(0), isolate);
   }
@@ skipping 7555 matching lines @@
 #undef WRITE_INT64_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_OBJECTS_INL_H_