Convert test_html5_special_event_targets to btest_exit. NFC (#20997)

Author: sbc100

test/browser/html5_special_event_targets.cpp

@@ -24,7 +24,5 @@ int main()
   EMSCRIPTEN_RESULT res = emscripten_webgl_make_context_current(context);
   assert(res == EMSCRIPTEN_RESULT_SUCCESS);
   assert(emscripten_webgl_get_current_context() == context);
-#ifdef REPORT_RESULT
-  REPORT_RESULT(0);
-#endif
+  return 0;
 }

test/test_browser.py

@@ -2767,7 +2767,7 @@ def test_html5_webgl_create_context2(self):
   # Verify bug https://github.com/emscripten-core/emscripten/issues/4556: creating a WebGL context to Module.canvas without an ID explicitly assigned to it.
   # (this only makes sense in the old deprecated -sDISABLE_DEPRECATED_FIND_EVENT_TARGET_BEHAVIOR=0 mode)
   def test_html5_special_event_targets(self):
-    self.btest('html5_special_event_targets.cpp', args=['-lGL'], expected='0')
+    self.btest_exit('html5_special_event_targets.cpp', args=['-lGL'])
 
   @requires_graphics_hardware
   def test_html5_webgl_destroy_context(self):