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

third_party/WebKit/Source/core/html/HTMLOptGroupElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLOptGroupElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLOptGroupElement.cpp b/third_party/WebKit/Source/core/html/HTMLOptGroupElement.cpp
index b00f2d1360a6aee8e10dc94e3f19049a8e1724f7..ac444a776dba0f03c49f7c2c8d44ebd0d4ed8390 100644
--- a/third_party/WebKit/Source/core/html/HTMLOptGroupElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLOptGroupElement.cpp
@@ -106,6 +106,11 @@ bool HTMLOptGroupElement::supportsFocus() const
     return HTMLElement::supportsFocus();
 }
 
+bool HTMLOptGroupElement::matchesEnabledPseudoClass() const
+{
+    return true;
+}
+
 void HTMLOptGroupElement::updateNonComputedStyle()
 {
     m_style = originalStyleForLayoutObject();