Remove unnecessary code from HTMLOptGroupElement.

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 09e3bd3a95c1747d75105bf2cac9ebfdae007eea..445dcf6320104355d38b653f5247cf2f58e0d5ec 100644
--- a/third_party/WebKit/Source/core/html/HTMLOptGroupElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLOptGroupElement.cpp
@@ -57,16 +57,9 @@ bool HTMLOptGroupElement::isDisabledFormControl() const
     return fastHasAttribute(disabledAttr);
 }
 
-void HTMLOptGroupElement::childrenChanged(const ChildrenChange& change)
-{
-    recalcSelectOptions();
-    HTMLElement::childrenChanged(change);
-}
-
 void HTMLOptGroupElement::parseAttribute(const QualifiedName& name, const AtomicString& oldValue, const AtomicString& value)
 {
     HTMLElement::parseAttribute(name, oldValue, value);
-    recalcSelectOptions();
 
     if (name == disabledAttr) {
         pseudoStateChanged(CSSSelector::PseudoDisabled);
@@ -76,13 +69,6 @@ void HTMLOptGroupElement::parseAttribute(const QualifiedName& name, const Atomic
     }
 }
 
-void HTMLOptGroupElement::recalcSelectOptions()
-{
-    // TODO(tkent): Should use ownerSelectElement().
-    if (HTMLSelectElement* select = Traversal<HTMLSelectElement>::firstAncestor(*this))
-        select->setRecalcListItems();
-}
-
 void HTMLOptGroupElement::attach(const AttachContext& context)
 {
     if (context.resolvedStyle) {