Issue WICG#59 - Add UA-Bitness hint

index.bs

@@ -289,6 +289,7 @@ A <dfn>client hints token</dfn> is a [=byte-lowercase=] representation of one of
   `Downlink`,
   `ECT`,
   `Sec-CH-UA-Arch`,
+  `Sec-CH-UA-Bitness`,
   `Sec-CH-UA-Model`,
   `Sec-CH-UA-Platform`,
   `Sec-CH-UA-Platform-Version`,
@@ -314,6 +315,7 @@ the following [=policy-controlled features=]:
 - <code><dfn export>ch-downlink</dfn></code> which has a [=default allowlist=] of `'self'`
 - <code><dfn export>ch-ect</dfn></code> which has a [=default allowlist=] of `'self'`
 - <code><dfn export>ch-ua-arch</dfn></code> which has a [=default allowlist=] of `'self'`
+- <code><dfn export>ch-ua-bitness</dfn></code> which has a [=default allowlist=] of `'self'`
 - <code><dfn export>ch-ua-model</dfn></code> which has a [=default allowlist=] of `'self'`
 - <code><dfn export>ch-ua-platform</dfn></code> which has a [=default allowlist=] of `'self'`
 - <code><dfn export>ch-ua-platform-version</dfn></code> which has a [=default allowlist=] of `'self'`
@@ -369,6 +371,8 @@ When asked to <dfn>find client hint value</dfn>, given |hint| as input, switch o
   <dd>a suitable <a href=https://wicg.github.io/netinfo/#ect-request-header-field>ECT value</a>
   <dt>`UA-Arch`
   <dd>a suitable <a href=https://wicg.github.io/ua-client-hints/#sec-ch-ua-arch>Arch value</a>
+  <dt>`UA-Bitness`
+  <dd>a suitable <a href=https://wicg.github.io/ua-client-hints/#sec-ch-ua-bitness>Bitness value</a>
   <dt>`UA-Model`
   <dd>a suitable <a href=https://wicg.github.io/ua-client-hints/#sec-ch-ua-model>Model value</a>
   <dt>`UA-Platform`