more cleanup of froms

src/main/java/org/htmlunit/html/HtmlElement.java

@@ -1022,7 +1022,13 @@ protected void checkChildHierarchy(final Node childNode) throws DOMException {
         super.checkChildHierarchy(childNode);
     }
 
-    void setOwningForm(final HtmlForm form) {
+    /**
+     * <span style="color:red">INTERNAL API - SUBJECT TO CHANGE AT ANY TIME - USE AT YOUR OWN RISK.</span><br>
+     *
+     * Allows the parser to connect to a form that is not a parent of this due to malformed HTML code
+     * @param form the owning form
+     */
+    public void setOwningForm(final HtmlForm form) {
         owningForm_ = form;
     }
 

src/main/java/org/htmlunit/html/HtmlForm.java

@@ -94,8 +94,6 @@ public class HtmlForm extends HtmlElement {
 
     private static final Pattern SUBMIT_CHARSET_PATTERN = Pattern.compile("[ ,].*");
 
-    private final List<HtmlElement> lostChildren_ = new ArrayList<>();
-
     private boolean isPreventDefault_;
 
     /**
@@ -932,27 +930,6 @@ public List<HtmlInput> getInputsByValue(final String value) {
         return results;
     }
 
-    /**
-     * <span style="color:red">INTERNAL API - SUBJECT TO CHANGE AT ANY TIME - USE AT YOUR OWN RISK.</span><br>
-     *
-     * Allows the parser to notify the form of a field that doesn't belong to its DOM children
-     * due to malformed HTML code
-     * @param field the form field
-     */
-    public void addLostChild(final HtmlElement field) {
-        lostChildren_.add(field);
-        field.setOwningForm(this);
-    }
-
-    /**
-     * Gets the form elements that may be submitted but that don't belong to the form's children
-     * in the DOM due to incorrect HTML code.
-     * @return the elements
-     */
-    public List<HtmlElement> getLostChildren() {
-        return lostChildren_;
-    }
-
     /**
      * {@inheritDoc}
      */

src/main/java/org/htmlunit/html/parser/neko/HtmlUnitNekoDOMBuilder.java

@@ -398,7 +398,7 @@ else if (consumingForm_ != null) {
             if (newElement instanceof SubmittableElement) {
                 // Let these be owned by the form
                 if (((HtmlElement) newElement).getEnclosingForm() != consumingForm_) {
-                    consumingForm_.addLostChild((HtmlElement) newElement);
+                    ((HtmlElement) newElement).setOwningForm(consumingForm_);
                 }
             }
         }