Steps to reproduce the problem:
1. Install a progressive web app in display standalone mode
2. Change the start url in the web app manifest
3. Open the page from the homescreen
4. I don't know if related but in the Service Worker call SkipWaiting()

What is the expected behavior?
The Start URL for the existing Homescreen Icon will be silently updated.

What went wrong?
Chrome Shows the add to homescreen dialog inside an installed pwa in standalone mode

Did this work before? N/A 

Does this work in other browsers? N/A

Chrome version: 58.0.3029.83  Channel: stable
OS Version: 7.1.2; Pixel Build/NJH47B
Flash Version:
 

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