### Version 4.1.4 ### Browser and OS info Chrome 65 / Windows 10 ### Steps to reproduce 1. expose the store to `window` 2. execute like below manually ```javascript window.store.replaceState({/* object content */}) ``` 3. vue-devtools got no update ### What is expected? it should update the state info. ### What is actually happening? nothing happened. <!-- generated by vue-issues. DO NOT REMOVE -->