The fact that Chromium runs multiple processes is unrelated to any field trials. Chromium has always been multi-process; that's why individual tabs and plugins can crash without taking down the whole browser. Additionally, multiple processes are needed in order to implement sandboxing on Linux.
Field trials have long been a part of Chromium too: https://blog.chromium.org/2012/05/changes-to-field-trials-in.... They are used to experiment with different solutions or, sometimes, to allow a change to be quickly reverted in the field if it's causing a problem. You can manually enable/disable several of these on chrome://flags/ (although it's not advised).
Field trials have long been a part of Chromium too: https://blog.chromium.org/2012/05/changes-to-field-trials-in.... They are used to experiment with different solutions or, sometimes, to allow a change to be quickly reverted in the field if it's causing a problem. You can manually enable/disable several of these on chrome://flags/ (although it's not advised).