Upgrade V8 to version 4.9.385.28

https://chromium.googlesource.com/v8/v8/+/4.9.385.28

FPIIM-449

Change-Id: I4b2e74289d4bf3667f2f3dc8aa2e541f63e26eb4
diff --git a/test/mjsunit/regress/regress-554865.js b/test/mjsunit/regress/regress-554865.js
new file mode 100644
index 0000000..9b66d79
--- /dev/null
+++ b/test/mjsunit/regress/regress-554865.js
@@ -0,0 +1,10 @@
+// Copyright 2015 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.
+//
+// Flags: --harmony-default-parameters
+
+(function() {
+  var x = {};
+  ((y = [42]) => assertEquals(42, y[0]))();
+})();