How to set the application icon for chromium

This has been a minor annoyance for the last few months, and I've finally figured out how to fix it: Sometime within the last few months, an upgrade prevented Chromium from finding its application icon…with the result that when minimised (or displayed in the panel window list or Alt-Tab) it used the default application icon. It looks to me as if the problem is that Chromium is now looking for chromium-browser.svg but chromium.svg is what's on my debian system. To …