Service worker struct should be exported without a 'for' attribute (#1590)

* Service worker struct should be exported without a 'for' attribute

* Move struct to own section

* Update docs/index.bs

Co-authored-by: Jake Archibald <[email protected]>

* Update docs/index.bs

Co-authored-by: Jake Archibald <[email protected]>

* Indenting and link fix

Co-authored-by: Jake Archibald <[email protected]>

Author: noamr

docs/index.bs

@@ -201,19 +201,20 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
           * <dfn export id="dfn-functional-events">Functional events</dfn>: {{fetch!!event}} and the [=events=] defined by other specifications that <a href="#extensibility">extend</a> the Service Workers specification. (See the <a href="#execution-context-events">list</a>.)
           * {{message!!event}} and {{messageerror!!event}}.
     </section>
-    <section>
-      <h4 id="service-worker-timing">Timing</h4>
+  </section>
 
-      Service workers mark certain points in time that are later exposed by the {{PerformanceNavigationTiming|navigation timing}} API.
+  <section>
+    <h3 id="service-worker-timing">Serview Worker Timing</h3>
 
-      A <dfn export>service worker timing info</dfn> is a [=/struct=]. It has the following [=struct/items=]:
+    Service workers mark certain points in time that are later exposed by the <a interface lt="PerformanceNavigationTiming">navigation timing</a> API.
 
-      <section dfn-for="service worker timing info">
+    A <dfn export>service worker timing info</dfn> is a [=/struct=]. It has the following [=struct/items=]:
+
+    <section dfn-for="service worker timing info">
         : <dfn export>start time</dfn>
         :: A {{DOMHighResTimeStamp}}, initially 0.
         : <dfn export>fetch event dispatch time</dfn>
         :: A {{DOMHighResTimeStamp}}, initially 0.
-      </section>
     </section>
   </section>