Don't throw when getting selection(Direction|Start|End) on input

third_party/WebKit/Source/core/html/HTMLInputElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Samsung Electronics. 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
@@ skipping 138 matching lines @@
                         ExceptionState&,
                         TextFieldEventBehavior = DispatchNoEvent);
 
   String valueOrDefaultLabel() const;
 
   // This function dispatches 'input' event for non-textfield types. Callers
   // need to handle any DOM structure changes by event handlers, or need to
   // delay the 'input' event with EventQueueScope.
   void setValueFromRenderer(const String&);
 
-  unsigned selectionStartForBinding(ExceptionState&) const;
-  unsigned selectionEndForBinding(ExceptionState&) const;
+  unsigned selectionStartForBinding(bool&, ExceptionState&) const;
+  unsigned selectionEndForBinding(bool&, ExceptionState&) const;
   String selectionDirectionForBinding(ExceptionState&) const;
   void setSelectionStartForBinding(unsigned, ExceptionState&);
   void setSelectionEndForBinding(unsigned, ExceptionState&);
   void setSelectionDirectionForBinding(const String&, ExceptionState&);
   void setSelectionRangeForBinding(unsigned start,
                                    unsigned end,
                                    ExceptionState&);
   void setSelectionRangeForBinding(unsigned start,
                                    unsigned end,
                                    const String& direction,
@@ skipping 254 matching lines @@
   // assumes that it lives as long as its owning element lives. If we move the
   // loader into the ImageInput object we may delete the loader while this
   // element lives on.
   Member<HTMLImageLoader> m_imageLoader;
   Member<ListAttributeTargetObserver> m_listAttributeTargetObserver;
 };
 
 }  // namespace blink
 
 #endif  // HTMLInputElement_h