Make arguments read only in strict mode.

test/mjsunit/strict-mode-arguments.js

+// Copyright 2011 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
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+//     * Redistributions in binary form must reproduce the above
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+
+"use strict";
+
+// arguments must be read only in strict mode.
+// NOTE: this test will be obsoleted in future changes when
+// assignment to arguments/eval will become syntax error in
+// strict mode eval code
+function TestArgumentsIsReadOnlyInStrict() {
+  // Lazy compiled. It verifies that the strict mode is correctly
+  // propagated from the initial parse to lazy compilation of the function.
+  function inner(a) {
+    eval('arguments = ["assigned"];');
+    return arguments[0];
+  }
+  return inner('argument');
+}
+
+assertEquals('argument', TestArgumentsIsReadOnlyInStrict());