Issue #3339411: Add Unload

src/PermissionsPolicy.php

@@ -81,6 +81,7 @@ class PermissionsPolicy {
     'serial'                          => PermissionsPolicy::FEATURE_SCHEMA_ALLOWLIST,
     'sync-script'                     => PermissionsPolicy::FEATURE_SCHEMA_ALLOWLIST,
     'trust-token-redemption'          => PermissionsPolicy::FEATURE_SCHEMA_ALLOWLIST,
+    'unload'                          => PermissionsPolicy::FEATURE_SCHEMA_ALLOWLIST,
     'vertical-scroll'                 => PermissionsPolicy::FEATURE_SCHEMA_ALLOWLIST,
     'window-placement'                => PermissionsPolicy::FEATURE_SCHEMA_ALLOWLIST,
 
@@ -151,6 +152,7 @@ class PermissionsPolicy {
     // 'serial'                          => PermissionsPolicy::ORIGIN_SELF,
     // 'sync-script'                     => PermissionsPolicy::ORIGIN_SELF,
     // 'trust-token-redemption'          => PermissionsPolicy::ORIGIN_SELF,
+    'unload'                          => PermissionsPolicy::ORIGIN_ANY,
     'vertical-scroll'                 => PermissionsPolicy::ORIGIN_ANY,
     'window-placement'                => PermissionsPolicy::ORIGIN_SELF,