Adding keys during enumeration should not result in their appearance.

Per https://github.com/tc39/proposal-object-values-entries/commit/9bd195495030e4a40b7b558dc857ce57549b056d and https://github.com/tc39/test262/pull/453#discussion_r47556411

test/built-ins/object/entries/getter-adding-key.js

@@ -2,7 +2,7 @@
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-description: Object.entries sees a new element added by a getter that is hit during iteration
+description: Object.entries does not see a new element added by a getter that is hit during iteration
 es7id: pending
 author: Jordan Harband
 ---*/
@@ -18,15 +18,12 @@ var bAddsC = {
 var result = Object.entries(bAddsC);
 
 assert.sameValue(Array.isArray(result), true, 'result is an array');
-assert.sameValue(result.length, 3, 'result has 3 items');
+assert.sameValue(result.length, 2, 'result has 2 items');
 
 assert.sameValue(Array.isArray(result[0]), true, 'first entry is an array');
 assert.sameValue(Array.isArray(result[1]), true, 'second entry is an array');
-assert.sameValue(Array.isArray(result[2]), true, 'third entry is an array');
 
 assert.sameValue(result[0][0], 'a', 'first entry has key "a"');
 assert.sameValue(result[0][1], 'A', 'first entry has value "A"');
 assert.sameValue(result[1][0], 'b', 'second entry has key "b"');
 assert.sameValue(result[1][1], 'B', 'second entry has value "B"');
-assert.sameValue(result[2][0], 'c', 'third entry has key "c"');
-assert.sameValue(result[2][1], 'C', 'third entry has value "C"');

test/built-ins/object/values/getter-adding-key.js

@@ -2,7 +2,7 @@
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-description: Object.values sees a new element added by a getter that is hit during iteration
+description: Object.values does not see a new element added by a getter that is hit during iteration
 es7id: pending
 author: Jordan Harband
 ---*/
@@ -18,8 +18,7 @@ var bAddsC = {
 var result = Object.values(bAddsC);
 
 assert.sameValue(Array.isArray(result), true, 'result is an array');
-assert.sameValue(result.length, 3, 'result has 3 items');
+assert.sameValue(result.length, 2, 'result has 2 items');
 
 assert.sameValue(result[0], 'A', 'first value is "A"');
 assert.sameValue(result[1], 'B', 'second value is "B"');
-assert.sameValue(result[2], 'C', 'third value is "C"');