bluetooth: Create base class BluetoothDevice::CreateGattConnection impl.

device/bluetooth/bluetooth_device_chromeos.h

Index: device/bluetooth/bluetooth_device_chromeos.h
diff --git a/device/bluetooth/bluetooth_device_chromeos.h b/device/bluetooth/bluetooth_device_chromeos.h
index f8846cdb37e3fbb012da23aa0a38a4514adeb514..ad300c727b4ad7fa8be4fa2dc49fdf30dd8289a2 100644
--- a/device/bluetooth/bluetooth_device_chromeos.h
+++ b/device/bluetooth/bluetooth_device_chromeos.h
@@ -46,6 +46,7 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothDeviceChromeOS
   uint16 GetDeviceID() const override;
   bool IsPaired() const override;
   bool IsConnected() const override;
+  bool IsGattConnected() const override;
   bool IsConnectable() const override;
   bool IsConnecting() const override;
   UUIDList GetUUIDs() const override;
@@ -101,6 +102,8 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothDeviceChromeOS
  protected:
   // BluetoothDevice override
   std::string GetDeviceName() const override;
+  void CreateGattConnectionImpl() override;
+  void DisconnectGatt() override;
 
  private:
   friend class BluetoothAdapterChromeOS;