Revert r20375.

test/intl/date-format/protected-icu-internals.js

 // Copyright 2013 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:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
 //       with the distribution.
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 //       contributors may be used to endorse or promote products derived
 //       from this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+// Internal object we got from native code should not be writable,
+// configurable or enumerable. One can still change its public properties, but
+// we don't use them to do actual work.
 
-function explode() {
-  var array = [1,2,3];
+var format = new Intl.DateTimeFormat([]);
 
-  Object.defineProperty(array, 4, {
-    get: function () { throw "dynamite"; },
-  });
+// Direct write should fail.
+format.formatter = {'zzz':'some random object'};
 
-  JSON.stringify(array);
+assertFalse(format.formatter.hasOwnProperty('zzz'));
+
+// Try redefining the property.
+var didThrow = false;
+try {
+  Object.defineProperty(format, 'formatter', {value: undefined});
+} catch(e) {
+  didThrow = true;
 }
+assertTrue(didThrow);
 
-try {
-  explode();
-  assertUnreachable();
-} catch(e) {
-  assertEquals("dynamite", e);
-}
+// Try deleting the property.
+assertFalse(delete format.formatter);