Upgrade V8 to 5.1.281.57  DO NOT MERGE

FPIIM-449

Change-Id: Id981b686b4d587ac31697662eb98bb34be42ad90
(cherry picked from commit 3b9bc31999c9787eb726ecdbfd5796bfdec32a18)
diff --git a/test/mjsunit/regress/regress-crbug-593697-2.js b/test/mjsunit/regress/regress-crbug-593697-2.js
new file mode 100644
index 0000000..1fcbaeb
--- /dev/null
+++ b/test/mjsunit/regress/regress-crbug-593697-2.js
@@ -0,0 +1,18 @@
+// Copyright 2016 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: --allow-natives-syntax --harmony-tailcalls
+
+"use strict";
+
+%SetForceInlineFlag(Math.cos);
+
+var f5 = (function f6(stdlib) {
+  "use asm";
+  var cos = stdlib.Math.cos;
+  function f5() {
+    return cos();
+  }
+  return { f5: f5 };
+})(this, {}).f5();