Fix special handling of Window.name

Author: zombie

src/build/emitter.ts

@@ -803,7 +803,7 @@ export function emitWebIdl(
     if (
       p.name === "name" &&
       i.name === "Window" &&
-      emitScope === EmitScope.InstanceOnly
+      prefix === "declare var "
     ) {
       printer.printLine("/** @deprecated */");
       printer.printLine("declare const name: void;");