[frame_stats] Use wgpu::PresentMode::AutoVsync/AutoNoVsync for VSync mode

The Auto* modes should have wider compatibility as they implement
fallback behavior based on what the platform supports. This also means
that on web "vsync off" will likely be incorrect.

examples/with_winit/src/lib.rs

@@ -158,9 +158,9 @@ fn run(
                                 render_cx.set_present_mode(
                                     &mut render_state.surface,
                                     if vsync_on {
-                                        wgpu::PresentMode::Fifo
+                                        wgpu::PresentMode::AutoVsync
                                     } else {
-                                        wgpu::PresentMode::Immediate
+                                        wgpu::PresentMode::AutoNoVsync
                                     },
                                 );
                             }

src/util.rs

@@ -70,7 +70,7 @@ impl RenderContext {
             format,
             width,
             height,
-            present_mode: wgpu::PresentMode::Fifo,
+            present_mode: wgpu::PresentMode::AutoVsync,
             alpha_mode: wgpu::CompositeAlphaMode::Auto,
             view_formats: vec![],
         };