device/bluetooth: Introduce BluetoothGattConnection.

device/bluetooth/bluetooth_device_win.cc

Index: device/bluetooth/bluetooth_device_win.cc
diff --git a/device/bluetooth/bluetooth_device_win.cc b/device/bluetooth/bluetooth_device_win.cc
index 94dd0e9bed75af142d18f1520efb1cb5ee80be64..a3f018e4279c84f356609b7c1f96ef0b1aba9f2a 100644
--- a/device/bluetooth/bluetooth_device_win.cc
+++ b/device/bluetooth/bluetooth_device_win.cc
@@ -207,6 +207,13 @@ void BluetoothDeviceWin::ConnectToService(
   socket->Connect(this, uuid, base::Bind(callback, socket), error_callback);
 }
 
+void BluetoothDeviceWin::CreateGattConnection(
+      const GattConnectionCallback& callback,
+      const ConnectErrorCallback& error_callback) {
+  // TODO(armansito): Implement.
+  error_callback.Run(ERROR_UNKNOWN);
+}
+
 void BluetoothDeviceWin::StartConnectionMonitor(
     const base::Closure& callback,
     const ErrorCallback& error_callback) {