Implement BluetoothGattNotifySession::Stop on Android, 2nd attempt

device/bluetooth/bluetooth_remote_gatt_characteristic_mac.h

Index: device/bluetooth/bluetooth_remote_gatt_characteristic_mac.h
diff --git a/device/bluetooth/bluetooth_remote_gatt_characteristic_mac.h b/device/bluetooth/bluetooth_remote_gatt_characteristic_mac.h
index 9fabee489170db9ed12a97df1c747e49a1a9200e..943fe760c9a095e5d015a7485f29e179b1071073 100644
--- a/device/bluetooth/bluetooth_remote_gatt_characteristic_mac.h
+++ b/device/bluetooth/bluetooth_remote_gatt_characteristic_mac.h
@@ -54,6 +54,15 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothRemoteGattCharacteristicMac
 
   DISALLOW_COPY_AND_ASSIGN(BluetoothRemoteGattCharacteristicMac);
 
+ protected:
+  void SubscribeToNotifications(BluetoothRemoteGattDescriptor* ccc_descriptor,
+                                const base::Closure& callback,
+                                const ErrorCallback& error_callback) override;
+  void UnsubscribeFromNotifications(
+      BluetoothRemoteGattDescriptor* ccc_descriptor,
+      const base::Closure& callback,
+      const ErrorCallback& error_callback) override;
+
  private:
   friend class BluetoothRemoteGattServiceMac;
   friend class BluetoothTestMac;