Fix issue with getOwnPropertySymbols and hidden properties

src/runtime.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 5793 matching lines @@
             if (name_from_hidden_proto == name) {
               names->set(j, isolate->heap()->hidden_string());
               hidden_strings++;
               break;
             }
           }
         }
       }
     }
     next_copy_index += local_property_count[i];
-    if (jsproto->HasHiddenProperties()) {
+
+    // Hidden properties only show up if the filter does not skip strings.
+    if ((filter & STRING) == 0 && jsproto->HasHiddenProperties()) {
       hidden_strings++;
     }
     if (i < length - 1) {
       jsproto = Handle<JSObject>(JSObject::cast(jsproto->GetPrototype()));
     }
   }
 
   // Filter out name of hidden properties object and
   // hidden prototype duplicates.
   if (hidden_strings > 0) {
@@ skipping 9144 matching lines @@
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     isolate->counters()->gc_last_resort_from_js()->Increment();
     isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags,
                                        "Runtime::PerformGC");
   }
 }
 
 
 } }  // namespace v8::internal