Fix arguments object stubs for large arrays.

test/mjsunit/regress/regress-crbug-614727.js

+// 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.
+
+"use strict";
+
+function f(a, b, c) { return arguments }
+function g(...args) { return args }
+
+// On 64-bit machine this produces a 768K array which is sufficiently small to
+// not cause a stack overflow, but big enough to move the allocated arguments
+// object into large object space (kMaxRegularHeapObjectSize == 600K).
+var length = Math.pow(2, 15) * 3;
+var args = new Array(length);
+assertEquals(length, f.apply(null, args).length);
+assertEquals(length, g.apply(null, args).length);
+
+// On 32-bit machines this produces an equally sized array, however it might in
+// turn trigger a stack overflow on 64-bit machines, which we need to catch.
+var length = Math.pow(2, 16) * 3;
+var args = new Array(length);
+try { f.apply(null, args) } catch(e) {}
+try { g.apply(null, args) } catch(e) {}