output should not match to :enabled or :disabled pseudo classes.

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

Index: third_party/WebKit/Source/core/css/SelectorChecker.cpp
diff --git a/third_party/WebKit/Source/core/css/SelectorChecker.cpp b/third_party/WebKit/Source/core/css/SelectorChecker.cpp
index c5d4b4d515eda624e7418022b8cb6f4f8eaf742e..9d63aa987adf7307c6a56d23b7c09168c8a17ead 100644
--- a/third_party/WebKit/Source/core/css/SelectorChecker.cpp
+++ b/third_party/WebKit/Source/core/css/SelectorChecker.cpp
@@ -823,7 +823,7 @@ bool SelectorChecker::checkPseudoClass(const SelectorCheckingContext& context, M
             return true;
         return element.active();
     case CSSSelector::PseudoEnabled:
-        if (element.isFormControlElement() || isHTMLOptionElement(element) || isHTMLOptGroupElement(element))
+        if ((element.isFormControlElement() && !isHTMLOutputElement(element)) || isHTMLOptionElement(element) || isHTMLOptGroupElement(element))

[tkent, 2016/04/25 09:40:40]

This is not a good change.  We should not add more element-specific logic to
SelectorChecker.

Please add Element::matchesEnabledPseudoClass(), and override it in
FormControlElement, HTMLOptionElement, HTMLOptGroupElement, and
HTMLOutputElement.

[ramya.v, 2016/04/25 14:47:29]

Done.

             return !element.isDisabledFormControl();
         if (isHTMLAnchorElement(element) || isHTMLAreaElement(element))
             return element.isLink();