Add user activation set to bounce tracking record (#70)

index.bs

@@ -51,7 +51,7 @@ spec: RFC6265; urlPrefix: https://tools.ietf.org/html/rfc6265/
         text: cookie store; url: section-5.3
         text: domain-match; url: section-5.1.3
         text: domain attribute; url: section-5.2.3
-spec: RFC7234; urlPrefix: https://tools.ietf.org/html/rfc7234/
+spec: RFC9111; urlPrefix: https://tools.ietf.org/html/rfc9111/
     type: dfn
         text: network cache; url: section-2
 spec: PARTITIONED-COOKIES; urlPrefix: https://datatracker.ietf.org/doc/html/draft-cutler-httpbis-partitioned-cookies#
@@ -363,6 +363,8 @@ A <dfn>bounce tracking record</dfn> is a [=struct=] whose items are:
 <dd>A [=set=] of [=sites=]' [=hosts=]. All server-side and client-side redirects hit during this [=extended navigation=].</dd>
 <dt><dfn>storage access set</dfn></dt>
 <dd>A [=set=] of [=sites=]' [=hosts=]. All sites which accessed storage during this [=extended navigation=].</dd>
+<dt><dfn>user activation set</dfn></dt>
+<dd>A [=set=] of [=sites=]' [=hosts=]. All sites which received a user activation during this [=extended navigation=].</dd>
 </dl>
 
 <h4 id="bounce-tracking-mitigations-data-model-constants">Constants</h4>
@@ -415,6 +417,9 @@ the following steps:
 1. Set [=user activation map=][|host|] to |topDocument|'s
     [=relevant settings object=]'s
     [=environment settings object/current wall time=].
+1. If |navigable|'s [=top-level traversable/bounce tracking record=] is not null:
+    1. [=set/Append=] |host| to |navigable|'s [=top-level traversable/bounce tracking record=]'s
+        [=bounce tracking record/storage access set=].
 
 </div>
 
@@ -503,6 +508,8 @@ Note: This includes the case where the current navigation was initiated by anoth
         1. Run [=record stateful bounces for bounce tracking=] given |navigable|'s [=navigable/active document=]'s [=relevant global object=].
         1. Set |navigable|'s [=top-level traversable/bounce tracking record=] to a new [=bounce tracking record=] with
             [=bounce tracking record/initial host=] set to |initialHost|.
+        1. [=set/Append=] |initialHost| to |navigable|'s [=top-level traversable/bounce tracking record=]'s
+            [=bounce tracking record/user activation set=].
     1. Otherwise, add |initialHost| to |navigable|'s [=top-level traversable/bounce tracking record=]'s [=bounce tracking record/bounce set=].
 
 </div>