A64: Synchronize with r15922.

test/webkit/fast/regex/non-capturing-backtracking.js

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
 //
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 // modification, are permitted provided that the following conditions
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 // 1.  Redistributions of source code must retain the above copyright
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 description(
-"Tests particular unusual cases of jump-if-less codegen."
+"This page tests for proper backtracking with greedy quantifiers and non-capturing parentheses."
 );
 
-shouldBe("!(true && undefined > 0) ? 'true' : 'false'", "'true'");
+var re = /(?:a*)a/;
+shouldBe("re.exec('a')", "['a']");