A new flag found in the Chrome OS Canary channel build (based on Chrome 70), points to a Mac-like centering of apps you have pinned to the Shelf in the platform. The new flag was discovered by the team over at Chrome Story and the flag is named “Newest shelf design”.
As Chrome OS users know, today the Shelf is justified to the left next to the App Drawer button. This has pretty much been the way that Chrome OS has been since the beginning.
This flag in the Canary Channel shifts it all to the center