Ignore setSelectionRange when node is un-parented.

Source/core/html/HTMLTextFormControlElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  *
  * 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
@@ skipping 330 matching lines @@
             ++index;
         }
     }
 
     ASSERT(index >= 0);
     return index;
 }
 
 void HTMLTextFormControlElement::setSelectionRange(int start, int end, TextFieldSelectionDirection direction, NeedToDispatchSelectEvent eventBehaviour, SelectionOption selectionOption)
 {
-    if (hasOpenShadowRoot() || !isTextFormControl())
+    if (hasOpenShadowRoot() || !isTextFormControl() || !parentOrShadowHostNode())

[leviw_travelin_and_unemployed, 2015/02/20 21:53:48]

You probably want isRooted(). If you parent this form control element into
another element it'd pass this test, but still not be in the document.

[szager1, 2015/02/20 22:05:18]

Done.

         return;
 
     const int editorValueLength = static_cast<int>(innerEditorValue().length());
     ASSERT(editorValueLength >= 0);
     end = std::max(std::min(end, editorValueLength), 0);
     start = std::min(std::max(start, 0), end);
     cacheSelection(start, end, direction);
 
     if (selectionOption == NotChangeSelection || (selectionOption == ChangeSelectionIfFocused && document().focusedElement() != this)) {
         if (eventBehaviour == DispatchSelectEvent)
@@ skipping 608 matching lines @@
             Text* textNode = toText(node);
             size_t firstLineBreak = textNode->data().find('\n', isPivotNode ? pivotPosition.offsetInContainerNode() : 0);
             if (firstLineBreak != kNotFound)
                 return Position(textNode, firstLineBreak + 1);
         }
     }
     return endOfInnerText(textFormControl);
 }
 
 } // namespace blink