fix wasm test compilation, remove old surface creation methods

tests/tests/create_surface_error.rs

@@ -1,6 +1,6 @@
 //! Test that `create_surface_*()` accurately reports those errors we can provoke.
 
-/// This test applies to those cfgs that have a `create_surface_from_canvas` method, which
+/// This test applies to those cfgs that can create a surface from a canvas, which
 /// include WebGL and WebGPU, but *not* Emscripten GLES.
 #[cfg(all(target_arch = "wasm32", not(target_os = "emscripten")))]
 #[wasm_bindgen_test::wasm_bindgen_test]
@@ -15,7 +15,7 @@ fn canvas_get_context_returned_null() {
 
     #[allow(clippy::redundant_clone)] // false positive — can't and shouldn't move out.
     let error = instance
-        .create_surface_from_canvas(canvas.clone())
+        .create_surface(wgpu::SurfaceTarget::Canvas(canvas.clone()))
         .unwrap_err();
 
     assert!(

wgpu-hal/src/gles/web.rs

@@ -30,24 +30,6 @@ pub struct Instance {
 }
 
 impl Instance {
-    pub fn create_surface_from_canvas(
-        &self,
-        canvas: web_sys::HtmlCanvasElement,
-    ) -> Result<Surface, crate::InstanceError> {
-        let result =
-            canvas.get_context_with_context_options("webgl2", &Self::create_context_options());
-        self.create_surface_from_context(Canvas::Canvas(canvas), result)
-    }
-
-    pub fn create_surface_from_offscreen_canvas(
-        &self,
-        canvas: web_sys::OffscreenCanvas,
-    ) -> Result<Surface, crate::InstanceError> {
-        let result =
-            canvas.get_context_with_context_options("webgl2", &Self::create_context_options());
-        self.create_surface_from_context(Canvas::Offscreen(canvas), result)
-    }
-
     /// Common portion of public `create_surface_from_*` functions.
     ///
     /// Note: Analogous code also exists in the WebGPU backend at