[es6] silence access-check failure for well-known symbol properties

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 1149 matching lines @@
   static inline MaybeHandle<JSReceiver> ToObject(Isolate* isolate,
                                                  Handle<Object> object);
   static MaybeHandle<JSReceiver> ToObject(Isolate* isolate,
                                           Handle<Object> object,
                                           Handle<Context> context);
 
   // Converts this to a Smi if possible.
   MUST_USE_RESULT static inline MaybeHandle<Smi> ToSmi(Isolate* isolate,
                                                        Handle<Object> object);
 
-  MUST_USE_RESULT static MaybeHandle<Object> GetProperty(
+  MUST_USE_RESULT static MaybeHandle<Object> GetPropertyInternal(
+      LookupIterator* it, bool* failedAccessCheck,
+      LanguageMode language_mode = SLOPPY);
+
+  MUST_USE_RESULT static inline MaybeHandle<Object> GetProperty(
       LookupIterator* it, LanguageMode language_mode = SLOPPY);
 
   // Implementation of [[Put]], ECMA-262 5th edition, section 8.12.5.
   MUST_USE_RESULT static MaybeHandle<Object> SetProperty(
       Handle<Object> object, Handle<Name> name, Handle<Object> value,
       LanguageMode language_mode,
       StoreFromKeyed store_mode = MAY_BE_STORE_FROM_KEYED);
 
   MUST_USE_RESULT static MaybeHandle<Object> SetProperty(
       LookupIterator* it, Handle<Object> value, LanguageMode language_mode,
@@ skipping 24 matching lines @@
   MUST_USE_RESULT static inline MaybeHandle<Object> GetPropertyOrElement(
       Handle<Object> object, Handle<Name> name,
       LanguageMode language_mode = SLOPPY);
   MUST_USE_RESULT static inline MaybeHandle<Object> GetProperty(
       Isolate* isolate, Handle<Object> object, const char* key,
       LanguageMode language_mode = SLOPPY);
   MUST_USE_RESULT static inline MaybeHandle<Object> GetProperty(
       Handle<Object> object, Handle<Name> name,
       LanguageMode language_mode = SLOPPY);
 
+  MUST_USE_RESULT static inline MaybeHandle<Object> GetPropertyOrFallbackValue(
+      Handle<Object> object, Handle<Name> name, Handle<Object> fallbackValue,
+      LanguageMode language_mode = SLOPPY);
+
   MUST_USE_RESULT static MaybeHandle<Object> GetPropertyWithAccessor(
       LookupIterator* it, LanguageMode language_mode);
   MUST_USE_RESULT static MaybeHandle<Object> SetPropertyWithAccessor(
       LookupIterator* it, Handle<Object> value, LanguageMode language_mode);
 
   MUST_USE_RESULT static MaybeHandle<Object> GetPropertyWithDefinedGetter(
       Handle<Object> receiver,
       Handle<JSReceiver> getter);
   MUST_USE_RESULT static MaybeHandle<Object> SetPropertyWithDefinedSetter(
       Handle<Object> receiver,
@@ skipping 9606 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_