The reason for the decision seems to be that developers didn't much care for a Dart VM
That strategy means the VM for Chrome goes out the door.
The post also says that Google Ads is a heavy Dart user and is ever-so-committed to the language for the foreseeable future, so the decision not to do a VM isn't a sign of decreasing interest in Dart.
Not even Google can change that. And as the Dart story shows, it's tried. And failed. ®