Add a key to WebUSB (#2157)

Author: Elchi3

features/webusb.yml

@@ -109,4 +109,5 @@ compat_features:
   - api.USBOutTransferResult.status
   - api.USBOutTransferResult.worker_support
   - api.WorkerNavigator.usb
+  - html.elements.iframe.allow.usb
   - http.headers.Permissions-Policy.usb

features/webusb.yml.dist

@@ -8,6 +8,13 @@ status:
     chrome_android: "61"
     edge: "79"
 compat_features:
+  # baseline: false
+  # support:
+  #   chrome: "60"
+  #   chrome_android: "60"
+  #   edge: "79"
+  - html.elements.iframe.allow.usb
+
   # ⬇️ Same status as overall feature ⬇️
   # baseline: false
   # support: