The very basics of a Promise-based proxy for the Worker #1 API. Still requires considerable cleanup, testing, and a solution for the exec-callback-via-event-type-name problem.

FossilOrigin-Name: 1e447849fb65887e806e3348a8a68f70ea6802bc0a1e56c385a279f27cc0cdda

ext/wasm/common/SqliteTestUtil.js

@@ -191,10 +191,7 @@
     */
     initSqlite3: function(){
       self.sqlite3ApiConfig = this.sqlite3ApiConfig;
-      return self.sqlite3InitModule(this).then(function(M){
-        delete self.sqlite3ApiConfig;
-        return M;
-      });
+      return self.sqlite3InitModule(this).finally(()=>delete self.sqlite3ApiConfig);
     }
   };
 })(self/*window or worker*/);