Use invalidation sets for :read-only and :read-write.

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

Index: third_party/WebKit/Source/core/html/HTMLFormControlElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLFormControlElement.cpp b/third_party/WebKit/Source/core/html/HTMLFormControlElement.cpp
index 54d22d6795a6220ec8c75e90eb70ab7ad54e55d4..d4d2c4970daac94905d7329e3f59c3ac9be44254 100644
--- a/third_party/WebKit/Source/core/html/HTMLFormControlElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLFormControlElement.cpp
@@ -172,7 +172,8 @@ void HTMLFormControlElement::parseAttribute(const QualifiedName& name, const Ato
         m_isReadOnly = !value.isNull();
         if (wasReadOnly != m_isReadOnly) {
             setNeedsWillValidateCheck();
-            setNeedsStyleRecalc(SubtreeStyleChange, StyleChangeReasonForTracing::fromAttribute(name));
+            pseudoStateChanged(CSSSelector::PseudoReadOnly);
+            pseudoStateChanged(CSSSelector::PseudoReadWrite);
             if (layoutObject())
                 LayoutTheme::theme().controlStateChanged(*layoutObject(), ReadOnlyControlState);
         }