Make Surface::as_hal take an immutable reference. (#6500)

Author: jerzywilczek

CHANGELOG.md

@@ -54,6 +54,10 @@ Bottom level categories:
 
 ### Changes
 
+#### General
+
+- Make `Surface::as_hal` take an immutable reference to the surface. By @jerzywilczek in [#9999](https://github.com/gfx-rs/wgpu/pull/9999)
+
 #### HAL
 
 - Change the `DropCallback` API to use `FnOnce` instead of `FnMut`. By @jerzywilczek in [#6482](https://github.com/gfx-rs/wgpu/pull/6482)

wgpu/src/api/surface.rs

@@ -159,7 +159,7 @@ impl Surface<'_> {
     /// - The raw handle obtained from the hal Surface must not be manually destroyed
     #[cfg(wgpu_core)]
     pub unsafe fn as_hal<A: wgc::hal_api::HalApi, F: FnOnce(Option<&A::Surface>) -> R, R>(
-        &mut self,
+        &self,
         hal_surface_callback: F,
     ) -> Option<R> {
         self.context