GitLab

This patch adds BluetoothGattConnectionChromeOS and implements
BluetoothDeviceChromeOS::CreateGattConnection. At this point, creating
a connection simply calls org.bluez.Device1.Connect without pairing.
BluetoothGattConnectionChromeOS::Disconnect currently doesn't do anything,
at least until there is a system in bluetoothd for managing GATT connections
properly between Chrome and its profiles and plugins.

BUG=384620,381305
TEST=device_unittests

Review URL: https://codereview.chromium.org/333983003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@278595 0039d316-1c4b-4281-b951-d872f2087c98