Changed the default value of tabIndex of <fieldset> and <output> to be -1 as they are non-focusable…

third_party/WebKit/Source/core/html/HTMLFormControlElement.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, 2008, 2009, 2010 Apple 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 138 matching lines @@
     void setNeedsWillValidateCheck();
     virtual bool recalcWillValidate() const;
 
     virtual void resetImpl() { }
     virtual bool supportsAutofocus() const;
 
 private:
     bool isFormControlElement() const final { return true; }
     bool alwaysCreateUserAgentShadowRoot() const override { return true; }
 
-    short tabIndex() const final;
+    short tabIndex() const;
 
     bool isValidElement() override;
     bool matchesValidityPseudoClasses() const override;
     void updateAncestorDisabledState() const;
 
     bool isValidationMessageVisible() const;
     ValidationMessageClient* validationMessageClient() const;
 
     // Requests validity recalc for the form owner, if one exists.
     void formOwnerSetNeedsValidityCheck();
@@ skipping 25 matching lines @@
 {
     return element.isFormControlElement();
 }
 
 DEFINE_HTMLELEMENT_TYPE_CASTS_WITH_FUNCTION(HTMLFormControlElement);
 DEFINE_TYPE_CASTS(HTMLFormControlElement, FormAssociatedElement, control, control->isFormControlElement(), control.isFormControlElement());
 
 } // namespace blink
 
 #endif