There are many privacy concern with Google Chrome as you know. Also about SRWare Iron as we disccuss on this forums: https://portableapps.com/node/34465 (and you can search google google for it)
Why we don't use Chromium builts which are open source and stable enough as you can test them too.
The stability of Chromium is not problem of PortableApps.com project. PortableApps's purpose is to make apps portable as their own format.
Here is a good built for Windows:
I don't know it is important but an updater for this built of Chromium:
How can you stand SRWare, and you make them portable :/ and you dont distribute Chromium...
At least make a portable version and set it as BETA, and never distribute as Stable version. So we can update it from PortableAppsMenu.