Editorial: use Infra language for Aborting section

Author: annevk

dom.bs

@@ -1779,22 +1779,20 @@ interface AbortController {
 <p>An {{AbortController}} object has an associated <dfn for=AbortController>signal</dfn> (an
 {{AbortSignal}} object).
 
-<p>The <dfn constructor for=AbortController><code>AbortController()</code></dfn> constructor, when
-invoked, must run these steps:
+<p>The
+<dfn constructor for=AbortController lt="AbortController()"><code>new AbortController()</code></dfn>
+constructor steps are:
 
 <ol>
  <li><p>Let <var>signal</var> be a new {{AbortSignal}} object.
 
- <li><p>Let <var>controller</var> be a new {{AbortController}} object whose
- <a for=AbortController>signal</a> is <var>signal</var>.
-
- <li><p>Return <var>controller</var>.
+ <li><p>Set <a>this</a>'s <a for=AbortController>signal</a> to <var>signal</var>.
 </ol>
 
-<p>The <dfn attribute for=AbortController><code>signal</code></dfn> attribute's getter, when
-invoked, must return <a>this</a>'s <a for=AbortController>signal</a>.
+<p>The <dfn attribute for=AbortController><code>signal</code></dfn> getter steps are to return
+<a>this</a>'s <a for=AbortController>signal</a>.
 
-<p>The <dfn method for=AbortController><code>abort()</code></dfn> method, when invoked, must
+<p>The <dfn method for=AbortController><code>abort()</code></dfn> method steps are to
 <a for=AbortSignal>signal abort</a> on <a>this</a>'s <a for=AbortController>signal</a>.
 
 
@@ -1840,8 +1838,8 @@ requirements to react in a reasonable way to {{AbortController/abort()}}. For ex
 [=AbortSignal/aborted flag=] might need to be propagated to a cross-thread environment, such as a
 service worker.
 
-<p>The <dfn attribute for=AbortSignal>aborted</dfn> attribute's getter, when invoked, must return
-true if <a>this</a>'s [=AbortSignal/aborted flag=] is set, and false otherwise.
+<p>The <dfn attribute for=AbortSignal>aborted</dfn> getter steps are to return true if <a>this</a>'s
+[=AbortSignal/aborted flag=] is set; otherwise false.
 
 <p>The <dfn attribute for=AbortSignal><code>onabort</code></dfn> attribute is an
 <a>event handler IDL attribute</a> for the <dfn export for=AbortSignal><code>onabort</code></dfn>