Widen definition of %HasComplexElements() to include non-enumerability

test/mjsunit/regress/regress-shift-enumerable.js

Index: test/mjsunit/regress/regress-shift-enumerable.js
diff --git a/test/mjsunit/regress/regress-shift-enumerable.js b/test/mjsunit/regress/regress-shift-enumerable.js
new file mode 100644
index 0000000000000000000000000000000000000000..f3ee258bf654bedaff4cdd3d197f5ff49d99e0fd
--- /dev/null
+++ b/test/mjsunit/regress/regress-shift-enumerable.js
@@ -0,0 +1,16 @@
+// Copyright 2014 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.
+
+var arr = [1, 2];
+Object.defineProperty(arr, 0xfffe, {
+  value: 3,
+  configurable: true,
+  writable: true,
+  enumerable: false
+});
+arr[0xffff] = 4;
+arr.shift();
+var desc = Object.getOwnPropertyDescriptor(arr, 0xfffe);
+assertEquals(4, desc.value);
+assertFalse(desc.enumerable);