arc: bluetooth: Always acquire a NotifySession

components/arc/bluetooth/arc_bluetooth_bridge.cc

Index: components/arc/bluetooth/arc_bluetooth_bridge.cc
diff --git a/components/arc/bluetooth/arc_bluetooth_bridge.cc b/components/arc/bluetooth/arc_bluetooth_bridge.cc
index 95a9f481e0f2541367c0f368ada188c8d8ca5014..3bc0d3092fdf3fd517879475d79e6276c6878fc8 100644
--- a/components/arc/bluetooth/arc_bluetooth_bridge.cc
+++ b/components/arc/bluetooth/arc_bluetooth_bridge.cc
@@ -1003,11 +1003,6 @@ void ArcBluetoothBridge::RegisterForGattNotification(
     return;
   }
 
-  if (characteristic->IsNotifying()) {
-    callback.Run(mojom::BluetoothGattStatus::GATT_SUCCESS);
-    return;
-  }
-
   characteristic->StartNotifySession(
       base::Bind(&ArcBluetoothBridge::OnGattNotifyStartDone,
                  weak_factory_.GetWeakPtr(), callback,
@@ -1030,11 +1025,6 @@ void ArcBluetoothBridge::DeregisterForGattNotification(
     return;
   }
 
-  if (!characteristic->IsNotifying()) {
-    callback.Run(mojom::BluetoothGattStatus::GATT_SUCCESS);
-    return;
-  }
-
   std::string char_id_str = characteristic->GetIdentifier();
   std::unique_ptr<BluetoothGattNotifySession> notify =
       std::move(notification_session_[char_id_str]);