Ship for-in initializer deprecation

test/webkit/toString-for-var-decl.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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 description(
 "This test checks for a couple of specific ways that bugs in toString() round trips have changed the meanings of functions with var declarations inside for loops."
 );
 
-function f1() { for (var j = 1 in []) {}  }
+function f1() { for (var j in []) {}  }
 var f2 = function () { for (var j = 1; j < 10; ++j) {}  }
 var f3 = function () { for (j = 1;j < 10; ++j) {}  }
 var f4 = function () { for (var j;;) {}  }
 
 var unevalf = function(x) { return '(' + x.toString() + ')'; }
 
 shouldBe("unevalf(eval(unevalf(f1)))", "unevalf(f1)");
 shouldBe("unevalf(eval(unevalf(f2)))", "unevalf(f2)");
 shouldBe("unevalf(eval(unevalf(f3)))", "unevalf(f3)");
 shouldBe("unevalf(eval(unevalf(f4)))", "unevalf(f4)");
 shouldBe("unevalf(f2) != unevalf(f3)", "true");