Option, checkbox and radio should support ':default' selector

third_party/WebKit/Source/core/css/SelectorChecker.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 813 matching lines @@
         return element.active();
     case CSSSelector::PseudoEnabled:
         if (element.isFormControlElement() || isHTMLOptionElement(element) || isHTMLOptGroupElement(element))
             return !element.isDisabledFormControl();
         if (isHTMLAnchorElement(element) || isHTMLAreaElement(element))
             return element.isLink();
         break;
     case CSSSelector::PseudoFullPageMedia:
         return element.document().isMediaDocument();
     case CSSSelector::PseudoDefault:
-        return element.isDefaultButtonForForm();
+        if (element.isDefaultButtonForForm())
+            return true;
+        if (isHTMLInputElement(element)) {

[tkent, 2016/03/03 06:46:02]

You shouldn't add code here.  You should override
HTMLOptionElement::isDefaultButtonForForm and
HTMLInputElement::isDefaultButtonForForm.

[ramya.v, 2016/03/03 10:29:19]

Done.

+            HTMLInputElement& inputElement = toHTMLInputElement(element);
+            if (inputElement.shouldAppearChecked() && !inputElement.shouldAppearIndeterminate())

[tkent, 2016/03/03 06:46:02]

The specification doesn't ask to check them.  It says "have a checked attribute"

[ramya.v, 2016/03/03 10:29:19]

Done.

+                return true;
+        } else if (isHTMLOptionElement(element) && toHTMLOptionElement(element).selected()) {

[tkent, 2016/03/03 06:46:02]

The specification doesn't ask to check |selected| IDL attribute.  It says "have
a selected attribute".

[ramya.v, 2016/03/03 10:29:19]

Done.

+            return true;
+        }
+        break;
     case CSSSelector::PseudoDisabled:
         // TODO(esprehn): Why not just always return isDisabledFormControl()?
         // Can it be true for elements not in the list below?
         if (element.isFormControlElement() || isHTMLOptionElement(element) || isHTMLOptGroupElement(element))
             return element.isDisabledFormControl();
         break;
     case CSSSelector::PseudoReadOnly:
         return element.matchesReadOnlyPseudoClass();
     case CSSSelector::PseudoReadWrite:
         return element.matchesReadWritePseudoClass();
@@ skipping 298 matching lines @@
 }
 
 bool SelectorChecker::matchesFocusPseudoClass(const Element& element)
 {
     if (InspectorInstrumentation::forcePseudoState(const_cast<Element*>(&element), CSSSelector::PseudoFocus))
         return true;
     return element.focused() && isFrameFocused(element);
 }
 
 } // namespace blink