[proxies] Implement Symbol/DONT_ENUM filtering for GetKeys()

src/objects.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.
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/allocation.h"
@@ skipping 9490 matching lines @@
   static MaybeHandle<Object> GetPrototype(Handle<JSProxy> receiver);
 
   // ES6 9.5.3
   MUST_USE_RESULT static Maybe<bool> IsExtensible(Handle<JSProxy> proxy);
 
   // ES6 9.5.4 (when passed DONT_THROW)
   MUST_USE_RESULT static Maybe<bool> PreventExtensions(
       Handle<JSProxy> proxy, ShouldThrow should_throw);
 
   // ES6 9.5.5
-  static bool GetOwnPropertyDescriptor(LookupIterator* it,
+  static bool GetOwnPropertyDescriptor(Isolate* isolate, Handle<JSProxy> proxy,
+                                       Handle<Name> name,
                                        PropertyDescriptor* desc);
 
   // ES6 9.5.6
   static bool DefineOwnProperty(Isolate* isolate, Handle<JSProxy> object,
                                 Handle<Object> key, PropertyDescriptor* desc,
                                 ShouldThrow should_throw);
 
   // ES6 9.5.7
   MUST_USE_RESULT static Maybe<bool> HasProperty(Isolate* isolate,
                                                  Handle<JSProxy> proxy,
@@ skipping 1190 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_