Option Groups with display: none should not show the children option elements

Source/web/ExternalPopupMenu.h

Index: Source/web/ExternalPopupMenu.h
diff --git a/Source/web/ExternalPopupMenu.h b/Source/web/ExternalPopupMenu.h
index 037a74aa087c67d6c6b86c3ad4f78e63446dfa1c..22089ef6bdb553a2cb8c3c2ec9ac8c8f6cfd48dc 100644
--- a/Source/web/ExternalPopupMenu.h
+++ b/Source/web/ExternalPopupMenu.h
@@ -77,6 +77,8 @@ private:
     // Fills |info| with the popup menu information contained in the
     // blink::PopupMenuClient associated with this ExternalPopupMenu.
     void getPopupMenuInfo(WebPopupMenuInfo* info);
+    int toPopupMenuItemIndex(int index);
+    int toExternalPopupMenuItemIndex(int index);
 
     blink::PopupMenuClient* m_popupMenuClient;
     RefPtr<blink::FrameView> m_frameView;