Merge webxr repository (#35228)

Signed-off-by: Martin Robinson <mrobinson@igalia.com>

components/webxr/Cargo.toml

@@ -0,0 +1,49 @@
+[package]
+name = "webxr"
+version = "0.0.1"
+authors = ["The Servo Project Developers"]
+edition = "2018"
+
+homepage = "https://github.com/servo/webxr"
+repository = "https://github.com/servo/webxr"
+keywords = ["ar", "headset", "openxr", "vr", "webxr"]
+license = "MPL-2.0"
+
+description = '''A safe Rust API that provides a way to interact with
+virtual reality and augmented reality devices and integration with OpenXR.
+The API is inspired by the WebXR Device API (https://www.w3.org/TR/webxr/)
+but adapted to Rust design patterns.'''
+
+[lib]
+path = "lib.rs"
+
+[features]
+default = ["x11"]
+x11 = ["surfman/sm-x11"]
+angle = ["surfman/sm-angle"]
+glwindow = []
+headless = []
+ipc = ["webxr-api/ipc", "serde"]
+openxr-api = ["angle", "openxr", "winapi", "wio", "surfman/sm-angle-default"]
+
+[dependencies]
+webxr-api = { path = "../shared/webxr" }
+crossbeam-channel = "0.5"
+euclid = "0.22"
+log = "0.4.6"
+openxr = { version = "0.19", optional = true }
+serde = { version = "1.0", optional = true }
+glow = "0.16"
+raw-window-handle = "0.6"
+surfman = { git = "https://github.com/servo/surfman", rev = "300789ddbda45c89e9165c31118bf1c4c07f89f6", features = [
+    "chains",
+    "sm-raw-window-handle-06",
+] }
+
+[target.'cfg(target_os = "windows")'.dependencies]
+winapi = { version = "0.3", features = [
+    "dxgi",
+    "d3d11",
+    "winerror",
+], optional = true }
+wio = { version = "0.2", optional = true }