Revert of Bluetooth: macOS: BluetoothRemoteGattCharacteristicMac::SubscribeToNotifications

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 4132f8e62cadad385d7dfe1763ce5f9efcde11fa..c690aeab8ff6daff1bbb23298e56bc7b1202bf36 100644
--- a/device/bluetooth/bluetooth_remote_gatt_characteristic_mac.h
+++ b/device/bluetooth/bluetooth_remote_gatt_characteristic_mac.h
@@ -48,6 +48,10 @@
   std::vector<BluetoothRemoteGattDescriptor*> GetDescriptors() const override;
   BluetoothRemoteGattDescriptor* GetDescriptor(
       const std::string& identifier) const override;
+  void StartNotifySession(const NotifySessionCallback& callback,
+                          const ErrorCallback& error_callback) override;
+  void StopNotifySession(BluetoothGattNotifySession* session,
+                         const base::Closure& callback) override;
   void ReadRemoteCharacteristic(const ValueCallback& callback,
                                 const ErrorCallback& error_callback) override;
   void WriteRemoteCharacteristic(const std::vector<uint8_t>& value,
@@ -122,8 +126,9 @@
   std::pair<ValueCallback, ErrorCallback> read_characteristic_value_callbacks_;
   // WriteRemoteCharacteristic request callbacks.
   std::pair<base::Closure, ErrorCallback> write_characteristic_value_callbacks_;
-  // Stores SubscribeToNotifications request callbacks.
-  typedef std::pair<base::Closure, const ErrorCallback> PendingStartNotifyCall;
+  // Stores StartNotifySession request callbacks.
+  typedef std::pair<NotifySessionCallback, ErrorCallback>
+      PendingStartNotifyCall;
   std::vector<PendingStartNotifyCall> start_notify_session_callbacks_;
   // Flag indicates if GATT event registration is in progress.
   bool start_notifications_in_progress_;