Fix GetOwnPropertyNames on access-checked objects

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index cfc572d8f9de576f9e487c8fd8f4a6dab0635428..5268236cfea5d868e1280c5699ba8afd2b1824a9 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -2053,9 +2053,9 @@ class JSObject: public JSReceiver {
   // with the specified attributes (ignoring interceptors).
   int NumberOfOwnProperties(PropertyAttributes filter = NONE);
   // Fill in details for properties into storage starting at the specified
-  // index.
-  void GetOwnPropertyNames(
-      FixedArray* storage, int index, PropertyAttributes filter = NONE);
+  // index. Returns the number of properties added.
+  int GetOwnPropertyNames(FixedArray* storage, int index,
+                          PropertyAttributes filter = NONE);
 
   // Returns the number of properties on this object filtering out properties
   // with the specified attributes (ignoring interceptors).
@@ -2283,6 +2283,9 @@ class JSObject: public JSReceiver {
   static void DeleteNormalizedProperty(Handle<JSObject> object,
                                        Handle<Name> name, int entry);
 
+  static bool AllCanRead(LookupIterator* it);
+  static bool AllCanWrite(LookupIterator* it);
+
  private:
   friend class JSReceiver;
   friend class Object;
@@ -3249,13 +3252,10 @@ class Dictionary: public HashTable<Derived, Shape, Key> {
 
   enum SortMode { UNSORTED, SORTED };
 
-  // Copies keys to preallocated fixed array.
-  void CopyKeysTo(FixedArray* storage, PropertyAttributes filter,
-                  SortMode sort_mode);
-
   // Fill in details for properties into storage.
-  void CopyKeysTo(FixedArray* storage, int index, PropertyAttributes filter,
-                  SortMode sort_mode);
+  // Returns the number of properties added.
+  int CopyKeysTo(FixedArray* storage, int index, PropertyAttributes filter,
+                 SortMode sort_mode);
 
   // Copies enumerable keys to preallocated fixed array.
   void CopyEnumKeysTo(FixedArray* storage);