Auto merge of #23721 - asajeffrey:webxr-glwindow, r=Manishearth

Register a glwindow test XR device

<!-- Please describe your changes on the following line: -->

Registers a test WebXR device with the glutin port.

---
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- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes do not require tests because it's webxr plumbing

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Cargo.lock

@@ -4119,6 +4119,7 @@ dependencies = [
  "sig 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "tinyfiledialogs 3.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "webxr 0.0.1 (git+https://github.com/servo/webxr)",
+ "webxr-api 0.0.1 (git+https://github.com/servo/webxr)",
  "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "winres 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "x11 2.17.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -5510,7 +5511,7 @@ dependencies = [
 [[package]]
 name = "webxr"
 version = "0.0.1"
-source = "git+https://github.com/servo/webxr#f8bfa261bcd54bfeb47f68f23043e547153d7491"
+source = "git+https://github.com/servo/webxr#39600af83b714e910389c912706d7cd06406c7bb"
 dependencies = [
  "euclid 0.19.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "gleam 0.6.16 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -5521,7 +5522,7 @@ dependencies = [
 [[package]]
 name = "webxr-api"
 version = "0.0.1"
-source = "git+https://github.com/servo/webxr#f8bfa261bcd54bfeb47f68f23043e547153d7491"
+source = "git+https://github.com/servo/webxr#39600af83b714e910389c912706d7cd06406c7bb"
 dependencies = [
  "euclid 0.19.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "gleam 0.6.16 (registry+https://github.com/rust-lang/crates.io-index)",

ports/glutin/Cargo.toml

@@ -59,7 +59,8 @@ log = "0.4"
 rust-webvr = { version = "0.13", features = ["glwindow"] }
 servo-media = {git = "https://github.com/servo/media"}
 tinyfiledialogs = "3.0"
-webxr =  { git = "https://github.com/servo/webxr", features = ["glwindow"] }
+webxr-api = { git = "https://github.com/servo/webxr", features = ["ipc"] }
+webxr = { git = "https://github.com/servo/webxr", features = ["ipc", "glwindow"] }
 
 [target.'cfg(any(target_os = "linux", target_os = "windows"))'.dependencies]
 image = "0.21"

ports/glutin/embedder.rs

@@ -71,4 +71,20 @@ impl EmbedderMethods for EmbedderCallbacks {
             // FIXME: support headless mode
         }
     }
+
+    fn register_webxr(&mut self, xr: &mut webxr_api::MainThreadRegistry) {
+        if !opts::get().headless {
+            if pref!(dom.webxr.test) {
+                warn!("Creating test XR device");
+                let gl = self.gl.clone();
+                let events_loop_clone = self.events_loop.clone();
+                let events_loop_factory = Box::new(move || {
+                    events_loop_clone.borrow_mut().take().ok_or(EventsLoopClosed)
+                });
+                let gl_version = app::gl_version();
+                let discovery = webxr::glwindow::GlWindowDiscovery::new(gl, events_loop_factory, gl_version);
+                xr.register(discovery);
+            }
+        }
+    }
 }