Track reasons for |Node::SetNeedsStyleRecalc|

Source/core/html/HTMLFormControlElement.cpp

Index: Source/core/html/HTMLFormControlElement.cpp
diff --git a/Source/core/html/HTMLFormControlElement.cpp b/Source/core/html/HTMLFormControlElement.cpp
index 3ad09c1b9ffe14b63973f60877eb318aad4bf0be..4172bec52bcb9c7b99f11b5686de706c7198a3cb 100644
--- a/Source/core/html/HTMLFormControlElement.cpp
+++ b/Source/core/html/HTMLFormControlElement.cpp
@@ -152,7 +152,7 @@ void HTMLFormControlElement::parseAttribute(const QualifiedName& name, const Ato
         m_isReadOnly = !value.isNull();
         if (wasReadOnly != m_isReadOnly) {
             setNeedsWillValidateCheck();
-            setNeedsStyleRecalc(SubtreeStyleChange);
+            setNeedsStyleRecalc(StyleRecalcDueToControl, SubtreeStyleChange);
             if (renderer() && renderer()->style()->hasAppearance())
                 RenderTheme::theme().stateChanged(renderer(), ReadOnlyControlState);
         }
@@ -187,7 +187,7 @@ void HTMLFormControlElement::requiredAttributeChanged()
     setNeedsValidityCheck();
     // Style recalculation is needed because style selectors may include
     // :required and :optional pseudo-classes.
-    setNeedsStyleRecalc(SubtreeStyleChange);
+    setNeedsStyleRecalc(StyleRecalcDueToRequiredOptionalPseudoClass, SubtreeStyleChange);

[rune, 2014/09/08 08:27:57]

This is an example of a case that should happen during style invalidation
through invalidation sets for the mentioned pseudo classes. Each of these cases
need to be analyzed to find out if there are style adjustments which are done
without involving selectors.

 }
 
 bool HTMLFormControlElement::supportsAutofocus() const
@@ -206,7 +206,7 @@ void HTMLFormControlElement::setAutofilled(bool autofilled)
         return;
 
     m_isAutofilled = autofilled;
-    setNeedsStyleRecalc(SubtreeStyleChange);
+    setNeedsStyleRecalc(StyleRecalcDueToControlValue, SubtreeStyleChange);
 }
 
 static bool shouldAutofocusOnAttach(const HTMLFormControlElement* element)
@@ -394,7 +394,7 @@ void HTMLFormControlElement::setNeedsWillValidateCheck()
     m_willValidateInitialized = true;
     m_willValidate = newWillValidate;
     setNeedsValidityCheck();
-    setNeedsStyleRecalc(SubtreeStyleChange);
+    setNeedsStyleRecalc(StyleRecalcDueToControl, SubtreeStyleChange);
     if (!m_willValidate)
         hideVisibleValidationMessage();
 }
@@ -489,7 +489,7 @@ void HTMLFormControlElement::setNeedsValidityCheck()
 {
     if (!m_validityIsDirty && willValidate()) {
         // Update style for pseudo classes such as :valid :invalid.
-        setNeedsStyleRecalc(SubtreeStyleChange);
+        setNeedsStyleRecalc(StyleRecalcDueToControl, SubtreeStyleChange);
         m_validityIsDirty = true;
     }