Add available_to_internals = true

Author: mfreed7

source

@@ -108663,6 +108663,10 @@ document.body.appendChild(text);
        <span data-x="concept-element-shadow-root">shadow root</span>'s
        <span data-x="concept-is-declarative-shadow-root">is declarative shadow root</span> property to true.</p></li>
 
+       <li><p>Set <span data-x="concept-declarative-shadow-host-element">declarative shadow host element</span>'s
+       <span data-x="concept-element-shadow-root">shadow root</span>'s
+       <span data-x="concept-available-to-element-internals">available to element internals</span> property to true.</p></li>
+
        <li><p><span data-x="concept-node-append">Append</span> the <span data-x="concept-declarative-template-element">declarative template element</span>'s DocumentFragment to the newly-created shadow root.</p></li>
 
        <li><p><span data-x="concept-node-remove">Remove</span> the <span data-x="concept-declarative-template-element">declarative template element</span> from the document.</p></li>