Bluetooth: macOS: Spelling consistency

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 ca3aa3000cb4ef9806996c163ed5005d7676782c..01aed06eddba3f0670040deaa96594afdbab4f58 100644
--- a/device/bluetooth/bluetooth_remote_gatt_characteristic_mac.h
+++ b/device/bluetooth/bluetooth_remote_gatt_characteristic_mac.h
@@ -123,9 +123,9 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothRemoteGattCharacteristicMac
   // WriteRemoteCharacteristic request callbacks.
   std::pair<base::Closure, ErrorCallback> write_characteristic_value_callbacks_;
   // Stores SubscribeToNotifications request callbacks.
-  typedef std::pair<base::Closure, ErrorCallback> PendingNotifyCallback;
-  // Stores SubscribeToNotifications request callback.
-  PendingNotifyCallback subscribe_to_notification_callback_;
+  typedef std::pair<base::Closure, ErrorCallback> PendingNotifyCallbacks;
+  // Stores SubscribeToNotifications request callbacks.
+  PendingNotifyCallbacks subscribe_to_notification_callbacks_;
   // Map of descriptors, keyed by descriptor identifier.
   std::unordered_map<std::string,
                      std::unique_ptr<BluetoothRemoteGattDescriptorMac>>