Add response status to response body info

fetch.bs

@@ -301,6 +301,9 @@ following <a for=struct>items</a>: [[RESOURCE-TIMING]] [[NAVIGATION-TIMING]]
  <dt><dfn export for="response body info" id="fetch-timing-info-decoded-body-size">decoded
  size</dfn> (default 0)
  <dd>A number.
+ <dt><dfn export for="response body info" id="fetch-timing-info-response-status">response
+ status</dfn> (default 0)
+ <dd>A <a for=/>status</a>.
 </dl>
 
 <p>To
@@ -4379,6 +4382,9 @@ steps:
 
      <li><p>Let <var>bodyInfo</var> be <var>response</var>'s <a for=response>body info</a>.
 
+     <li><p>Let <var>bodyInfo</var>'s <a for="response body info">response status</a> be
+     <var>response</var>'s <a for=response>status</a>.
+
      <li>
       <p>If <var>response</var>'s <a for=response>timing allow passed flag</a> is not set,
       then set <var>timingInfo</var> to a the result of <a>creating an opaque timing info</a> for