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

test/webkit/dfg-patchable-get-by-id-after-watchpoint.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 49 matching lines @@
     var expected = (i % 2) ? 44 : 27;
     if (i == 150) {
         // Cause first the watchpoint on o.f to fire, and then the GetById
         // to be reset.
         O.prototype.g = 57; // Fire the watchpoint.
         P1.prototype.h = 58; // Reset the GetById.
         P2.prototype.h = 59; // Not necessary, but what the heck - this resets the GetById even more.
     }
     shouldBe("foo(o, p)", "" + expected);
 }
-