| Index: device/bluetooth/bluetooth_low_energy_device_mac.mm | 
| diff --git a/device/bluetooth/bluetooth_low_energy_device_mac.mm b/device/bluetooth/bluetooth_low_energy_device_mac.mm | 
| index 1d2267c2788bd4c8b172281e1fe75c822031754c..a153cb1c180f4cd3691e628f9f6c7995fe45f503 100644 | 
| --- a/device/bluetooth/bluetooth_low_energy_device_mac.mm | 
| +++ b/device/bluetooth/bluetooth_low_energy_device_mac.mm | 
| @@ -321,6 +321,15 @@ void BluetoothLowEnergyDeviceMac::DidUpdateValue( | 
| gatt_service->DidUpdateValue(characteristic, error); | 
| } | 
|  | 
| +void BluetoothLowEnergyDeviceMac::DidWriteValue( | 
| +    CBCharacteristic* characteristic, | 
| +    NSError* error) { | 
| +  BluetoothRemoteGattServiceMac* gatt_service = | 
| +      GetBluetoothRemoteGattService(characteristic.service); | 
| +  DCHECK(gatt_service); | 
| +  gatt_service->DidWriteValue(characteristic, error); | 
| +} | 
| + | 
| // static | 
| std::string BluetoothLowEnergyDeviceMac::GetPeripheralIdentifier( | 
| CBPeripheral* peripheral) { | 
|  |