Make sure files end with exactly one new line and police this in presubmit.

test/webkit/dfg-put-by-id-allocate-storage.js

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions
 // are met:
 // 1.  Redistributions of source code must retain the above copyright
 //     notice, this list of conditions and the following disclaimer.
 // 2.  Redistributions in binary form must reproduce the above copyright
 //     notice, this list of conditions and the following disclaimer in the
@@ skipping 29 matching lines @@
 for (var i = 0; i < 150; ++i) {
     var o = foo();
     shouldBe("o.a", "1");
     shouldBe("o.b", "2");
     shouldBe("o.c", "3");
     shouldBe("o.d", "4");
     shouldBe("o.e", "5");
     shouldBe("o.f", "6");
     shouldBe("o.g", "7");
 }
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