Read characteristic implementation on macOS

device/bluetooth/bluetooth_remote_gatt_service_mac.mm

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "device/bluetooth/bluetooth_remote_gatt_service_mac.h"
 
 #import <CoreBluetooth/CoreBluetooth.h>
 #include <vector>
 
 #include "base/logging.h"
@@ skipping 101 matching lines @@
         characteristic_to_remove;
     pair_to_remove->second.swap(characteristic_to_remove);
     gatt_characteristic_macs_.erase(pair_to_remove);
     GetMacAdapter()->NotifyGattCharacteristicRemoved(
         characteristic_to_remove.get());
   }
   is_discovery_complete_ = true;
   GetMacAdapter()->NotifyGattServiceChanged(this);
 }
 
+void BluetoothRemoteGattServiceMac::DidUpdateValue(
+    CBCharacteristic* characteristic,
+    NSError* error) {
+  BluetoothRemoteGattCharacteristicMac* gatt_characteristic =
+      GetBluetoothRemoteGattCharacteristicMac(characteristic);
+  DCHECK(gatt_characteristic);
+  gatt_characteristic->DidUpdateValue(error);
+}
+
 bool BluetoothRemoteGattServiceMac::IsDiscoveryComplete() {
   return is_discovery_complete_;
 }
 
 BluetoothAdapterMac* BluetoothRemoteGattServiceMac::GetMacAdapter() const {
   return bluetooth_device_mac_->GetMacAdapter();
 }
 
 CBPeripheral* BluetoothRemoteGattServiceMac::GetCBPeripheral() const {
   return bluetooth_device_mac_->GetPeripheral();
@@ skipping 15 matching lines @@
         return pair.second->GetCBCharacteristic() == characteristic;
       });
   if (found == gatt_characteristic_macs_.end()) {
     return nullptr;
   } else {
     return found->second.get();
   }
 }
 
 }  // namespace device