Update <select> when any of its <option> children has "display: none"

Source/core/html/HTMLOptionElement.cpp

Index: Source/core/html/HTMLOptionElement.cpp
diff --git a/Source/core/html/HTMLOptionElement.cpp b/Source/core/html/HTMLOptionElement.cpp
index c0b02f12ef71b46fdeb0ba02b6d1e17bed4813ba..6d38c9a367fae85256d93fa68824b4fb0019650c 100644
--- a/Source/core/html/HTMLOptionElement.cpp
+++ b/Source/core/html/HTMLOptionElement.cpp
@@ -293,7 +293,12 @@ void HTMLOptionElement::setLabel(const AtomicString& label)
 
 void HTMLOptionElement::updateNonRenderStyle()
 {
+    bool oldDisplayNoneStatus = isDisplayNone();
     m_style = originalStyleForRenderer();
+    if (oldDisplayNoneStatus != isDisplayNone()) {
+        if (HTMLSelectElement* select = ownerSelectElement())
+            select->updateListOnRenderer();
+    }
 }
 
 RenderStyle* HTMLOptionElement::nonRendererStyle() const
@@ -375,4 +380,10 @@ HTMLFormElement* HTMLOptionElement::form() const
     return 0;
 }
 
+bool HTMLOptionElement::isDisplayNone() const
+{
+    RenderStyle* style = nonRendererStyle();
+    return style && style->display() == NONE;
+}
+
 } // namespace WebCore