ozone/x11: fix VA-API.

https://chromium-review.googlesource.com/c/chromium/src/+/3141878

shell/browser/native_window_views.cc

@@ -520,10 +520,8 @@ bool NativeWindowViews::IsEnabled() {
 #if defined(OS_WIN)
   return ::IsWindowEnabled(GetAcceleratedWidget());
 #elif defined(OS_LINUX)
-#if defined(USE_X11)
-  if (!features::IsUsingOzonePlatform()) {
-    return !event_disabler_.get();
-  }
+#if BUILDFLAG(USE_VAAPI_X11)
+  return !event_disabler_.get();
 #endif
   NOTIMPLEMENTED();
   return true;