Add initial code-stub version of Object.prototype.hasOwnProperty

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index ff0706b7d1f96d3b337704a4892fcfbbe8edc3d6..92487371e32efa8f1caab4e3d6fb3bf8ce1e46ef 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -3088,6 +3088,11 @@ class DescriptorArray: public FixedArray {
            kDescriptorDetails;
   }
 
+  // Conversion from descriptor number to array indices.
+  static int ToKeyIndex(int descriptor_number) {
+    return kFirstIndex + (descriptor_number * kDescriptorSize) + kDescriptorKey;
+  }
+
  private:
   // An entry in a DescriptorArray, represented as an (array, index) pair.
   class Entry {
@@ -3103,13 +3108,6 @@ class DescriptorArray: public FixedArray {
     int index_;
   };
 
-  // Conversion from descriptor number to array indices.
-  static int ToKeyIndex(int descriptor_number) {
-    return kFirstIndex +
-           (descriptor_number * kDescriptorSize) +
-           kDescriptorKey;
-  }
-
   static int ToValueIndex(int descriptor_number) {
     return kFirstIndex +
            (descriptor_number * kDescriptorSize) +