Meta: export form owner and submit button

For whatwg/xhr#366.

source

@@ -44120,8 +44120,8 @@ interface <dfn interface>HTMLTableCellElement</dfn> : <span>HTMLElement</span> {
 
     <p>Some <span data-x="category-submit">submittable elements</span> can be, depending on their
     attributes, <dfn data-x="concept-button">buttons</dfn>. The prose below defines when an element
-    is a button. Some buttons are specifically <dfn data-x="concept-submit-button">submit
-    buttons</dfn>.</p>
+    is a button. Some buttons are specifically <dfn export data-lt="submit button"
+    data-x="concept-submit-button">submit buttons</dfn>.</p>
    </dd>
 
    <dt><dfn data-x="category-reset">Resettable elements</dfn></dt>
@@ -54128,9 +54128,10 @@ interface <dfn interface>HTMLLegendElement</dfn> : <span>HTMLElement</span> {
   <h5>Association of controls and forms</h5>
 
   <p>A <span>form-associated element</span> can have a relationship with a <code>form</code>
-  element, which is called the element's <dfn>form owner</dfn>. If a <span>form-associated
-  element</span> is not associated with a <code>form</code> element, its <span>form owner</span> is
-  said to be null.</p>
+  element, which is called the element's <dfn export
+  for="button,fieldset,input,object,output,select,textarea,img,form-associated custom element">form
+  owner</dfn>. If a <span>form-associated element</span> is not associated with a <code>form</code>
+  element, its <span>form owner</span> is said to be null.</p>
 
   <p>A <span>form-associated element</span> has an associated <dfn>parser inserted flag</dfn>.</p>
 
@@ -132115,6 +132116,7 @@ INSERT INTERFACES HERE
   Jon Coppeard,
   Jon Ferraiolo,
   Jon Gibbins,
+  Jon Jensen,
   Jon Perlow,
   Jonas Sicking,
   Jonathan Cook,