2 files changed, 14 insertions, 9 deletions
diff --git a/components/script/dom/fakexrdevice.rs b/components/script/dom/fakexrdevice.rs
index bb73580e98a..d193c095717 100644
--- a/components/script/dom/fakexrdevice.rs
+++ b/components/script/dom/fakexrdevice.rs
@@ -5,6 +5,7 @@
 use crate::dom::bindings::codegen::Bindings::FakeXRDeviceBinding::{
     self, FakeXRDeviceMethods, FakeXRRigidTransformInit, FakeXRViewInit,
 };
+use crate::dom::bindings::codegen::Bindings::XRSessionBinding::XRVisibilityState;
 use crate::dom::bindings::codegen::Bindings::XRViewBinding::XREye;
 use crate::dom::bindings::error::{Error, Fallible};
 use crate::dom::bindings::refcounted::TrustedPromise;
@@ -20,7 +21,7 @@ use ipc_channel::ipc::IpcSender;
 use ipc_channel::router::ROUTER;
 use profile_traits::ipc;
 use std::rc::Rc;
-use webxr_api::{MockDeviceMsg, MockViewInit, MockViewsInit};
+use webxr_api::{MockDeviceMsg, MockViewInit, MockViewsInit, Visibility};
 
 #[dom_struct]
 pub struct FakeXRDevice {
@@ -163,7 +164,17 @@ impl FakeXRDeviceMethods for FakeXRDevice {
         Ok(())
     }
 
-    /// https://github.com/immersive-web/webxr-test-api/blob/master/explainer.md
+    /// https://immersive-web.github.io/webxr-test-api/#dom-fakexrdevice-simulatevisibilitychange
+    fn SimulateVisibilityChange(&self, v: XRVisibilityState) {
+        let v = match v {
+            XRVisibilityState::Visible => Visibility::Visible,
+            XRVisibilityState::Visible_blurred => Visibility::VisibleBlurred,
+            XRVisibilityState::Hidden => Visibility::Hidden,
+        };
+        let _ = self.sender.send(MockDeviceMsg::VisibilityChange(v));
+    }
+
+    /// https://immersive-web.github.io/webxr-test-api/#dom-fakexrdevice-disconnect
     fn Disconnect(&self) -> Rc<Promise> {
         let global = self.global();
         let p = Promise::new(&global);
diff --git a/components/script/dom/webidls/FakeXRDevice.webidl b/components/script/dom/webidls/FakeXRDevice.webidl
index 4dde2678435..8d981c4182a 100644
--- a/components/script/dom/webidls/FakeXRDevice.webidl
+++ b/components/script/dom/webidls/FakeXRDevice.webidl
@@ -10,9 +10,6 @@ interface FakeXRDevice {
   // requestAnimationFrame() callbacks.
   [Throws] void setViews(sequence<FakeXRViewInit> views);
 
-  // // behaves as if device was disconnected
-  // Promise<void> disconnect();
-
   [Throws] void setViewerOrigin(FakeXRRigidTransformInit origin, optional boolean emulatedPosition = false);
   void clearViewerOrigin();
 
@@ -20,12 +17,9 @@ interface FakeXRDevice {
   void clearFloorOrigin();
 
   // // Simulates devices focusing and blurring sessions.
-  // void simulateVisibilityChange(XRVisibilityState);
+  void simulateVisibilityChange(XRVisibilityState state);
 
   // void setBoundsGeometry(sequence<FakeXRBoundsPoint> boundsCoodinates);
-  // // Sets eye level used for calculating floor-level spaces
-  // void setEyeLevel(float eyeLevel);
-
 
   // Promise<FakeXRInputController>
   //     simulateInputSourceConnection(FakeXRInputSourceInit);