My chromebook is the Acer C710-2490, OS version: PARROT NENE F-D 0845. On the ChromeOS partition, i do not have the bluetooth icon so I cannot pair any bluetooth devices. Yet, once i installed chrubuntu to dual boot, bluetooth support is immediately availabl and usable on the inux partition. 
Obviously, buetooth is supported in the hardware, so how can i enable it on the ChromeOS side,without a dongle? FWIW, no dongle is required to connect bluetooth devices on the Ubuntu (chrubuntu) side.
Surely, this should be / is feasible? Not having bluetooth support in chromeos on this machine is the only disappointment since I bought it just over a month ago. 