The idea behind Chromer, when it first launched, was that it would open all links you clicked on in a Chrome Custom Tab. At the time, not many apps had implemented Custom Tabs so Chromer avoided their built-in browsers, and it also saved your device from having to open the full Chrome browser while still giving you the benefits of its rendering, security, and saved passwords. Now with Custom Tabs being used by more and more apps, the benefit of Chromer is a little less clear.
[Hands-on] Chromer becomes Lynket with plenty of additions for version 2.0 was written by the awesome team at Android Police.