Don't use OwnPrototypeChainLength in GetOwnPropertyNames

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 "src/allocation.h"
 #include "src/assert-scope.h"
 #include "src/base/bits.h"
@@ skipping 2309 matching lines @@
   inline int GetInternalFieldCount();
   inline int GetInternalFieldOffset(int index);
   inline Object* GetInternalField(int index);
   inline void SetInternalField(int index, Object* value);
   inline void SetInternalField(int index, Smi* value);
 
   // Returns the number of properties on this object filtering out properties
   // 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 that were 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).
   int NumberOfOwnElements(PropertyAttributes filter);
   // Returns the number of enumerable elements (ignoring interceptors).
   int NumberOfEnumElements();
   // Returns the number of elements on this object filtering out elements
   // with the specified attributes (ignoring interceptors).
   int GetOwnElementKeys(FixedArray* storage, PropertyAttributes filter);
   // Count and fill in the enumerable elements into storage.
@@ skipping 1512 matching lines @@
 
   // Returns the number of enumerable elements in the dictionary.
   int NumberOfEnumElements();
 
   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);
+  int CopyKeysTo(FixedArray* storage, int index, PropertyAttributes filter,
+                 SortMode sort_mode);
 
   // Accessors for next enumeration index.
   void SetNextEnumerationIndex(int index) {
     DCHECK(index != 0);
     this->set(kNextEnumerationIndexIndex, Smi::FromInt(index));
   }
 
   int NextEnumerationIndex() {
     return Smi::cast(this->get(kNextEnumerationIndexIndex))->value();
   }
@@ skipping 7256 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_