Low risk non-nullable => nullable change

third_party/WebKit/Source/core/html/HTMLTextAreaElement.idl

 /*
  * Copyright (C) 2006, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Samuel Weinig <sam.weinig@gmail.com>
  * Copyright (C) 2011 Motorola Mobility, Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 35 matching lines @@
     readonly attribute ValidityState validity;
     readonly attribute DOMString validationMessage;
     boolean checkValidity();
     boolean reportValidity();
     void setCustomValidity(DOMString error);
 
     readonly attribute NodeList labels;
 
     void select();
     // TODO(foolip): selectionStart and selectionEnd should be unsigned long.
-    attribute long selectionStart;
-    attribute long selectionEnd;
-    attribute DOMString selectionDirection;
+    attribute long? selectionStart;
+    attribute long? selectionEnd;
+    attribute DOMString? selectionDirection;
     [RaisesException] void setRangeText(DOMString replacement);
     [RaisesException] void setRangeText(DOMString replacement,
                                         unsigned long start,
                                         unsigned long end,
                                         optional SelectionMode selectionMode = "preserve");
     // TODO(foolip): The start and end arguments should be unsigned long and
     // should not be optional.
     [ImplementedAs=setSelectionRangeForBinding]
     void setSelectionRange([Default=Undefined] optional long start,
                            [Default=Undefined] optional long end,
                            optional DOMString direction);
 
     // HTML autocapitalize proposal
     // https://github.com/mounirlamouri/html-autocapitalize/blob/master/proposal.md
     [Measure] attribute DOMString autocapitalize;
 };