Fix issue with getOwnPropertySymbols and hidden properties

test/mjsunit/regress/regress-crbug-350864.js

Index: test/mjsunit/regress/regress-crbug-350864.js
diff --git a/test/mjsunit/regress/regress-333594.js b/test/mjsunit/regress/regress-crbug-350864.js
similarity index 88%
copy from test/mjsunit/regress/regress-333594.js
copy to test/mjsunit/regress/regress-crbug-350864.js
index 6f6dbaafcd64d8b752226a290df525ca200b69a0..eef3dba108206aa9da2a4aa95a7912867873c5ba 100644
--- a/test/mjsunit/regress/regress-333594.js
+++ b/test/mjsunit/regress/regress-crbug-350864.js
@@ -25,18 +25,12 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --allow-natives-syntax
+// Flags: --harmony_symbols --harmony-collections
 
-var a = { x: 1.1 };
-a.x = 0;
-var G = a.x;
-var o = { x: {} };
-
-function func() {
-  return {x: G};
-}
-
-func();
-func();
-%OptimizeFunctionOnNextCall(func);
-assertEquals(0, func().x);
+var v0 = new WeakMap;
+var v1 = {};
+v0.set(v1, 1);
+var sym = Symbol();
+v1[sym] = 1;
+var symbols = Object.getOwnPropertySymbols(v1);
+assertArrayEquals([sym], symbols);