Fix for timer scheduling happening on the incorrect thread when wasm …

…threading is enabled (#70863)

src/mono/mono/mini/mini-wasm.c

@@ -11,6 +11,12 @@
 #include <mono/utils/mono-threads.h>
 #include <mono/metadata/components.h>
 
+#ifdef HOST_BROWSER
+#ifndef DISABLE_THREADS
+#include <mono/utils/mono-threads-wasm.h>
+#endif
+#endif
+
 static int mono_wasm_debug_level = 0;
 #ifndef DISABLE_JIT
 
@@ -617,7 +623,13 @@ void
 mono_wasm_set_timeout (int timeout)
 {
 #ifdef HOST_BROWSER
-	mono_set_timeout (timeout);
+#ifndef DISABLE_THREADS
+    if (!mono_threads_wasm_is_browser_thread ()) {
+        mono_threads_wasm_async_run_in_main_thread_vi ((void (*)(gpointer))mono_wasm_set_timeout, GINT_TO_POINTER(timeout));
+        return;
+    }
+#endif
+    mono_set_timeout (timeout);
 #endif
 }