[cmrdporcupine]

It works primarily because code health is a number one goal here, everything goes through rigorous mandatory code review, nothing submits into the repository without running all affected test targets, and the goal is that everyone can pretty much "always" (for various definitions) build off head.

And also that there be no walls between teams and projects and code sharing is a universal value across the company. At least outside of Chrome/Android, which are in their own worlds.