Remove element related checks for PseudoDisabled css class.

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 5cc7f0fcfee067de6833d291f67f2f2dec7c83ea..24506a5c5f8bbd519bc01ea14a2e58a41bdc346c 100644
--- a/third_party/WebKit/Source/core/css/SelectorChecker.cpp
+++ b/third_party/WebKit/Source/core/css/SelectorChecker.cpp
@@ -829,11 +829,7 @@ bool SelectorChecker::checkPseudoClass(const SelectorCheckingContext& context, M
     case CSSSelector::PseudoDefault:
         return element.matchesDefaultPseudoClass();
     case CSSSelector::PseudoDisabled:
-        // TODO(esprehn): Why not just always return isDisabledFormControl()?
-        // Can it be true for elements not in the list below?

[tkent, 2016/04/27 04:40:43]

The answer to esprehn's question is NO.  So we don't need to indroduce
matchesDisabledPseudoClass, and the code here should be just:

case CSSSelector::PseudoDisabled:
    return element.isDisabledFormControl();

[ramya.v, 2016/04/27 05:41:35]

Thanks :)
Done.

-        if (element.isFormControlElement() || isHTMLOptionElement(element) || isHTMLOptGroupElement(element))
-            return element.isDisabledFormControl();
-        break;
+        return element.matchesDisabledPseudoClass();
     case CSSSelector::PseudoReadOnly:
         return element.matchesReadOnlyPseudoClass();
     case CSSSelector::PseudoReadWrite: