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 29b92d8ec94873772774a9f6a54966bd295babc2..fb716aca60ea93b031c0f2f2ad7cf2d99bb6217c 100644
--- a/components/arc/bluetooth/arc_bluetooth_bridge.cc
+++ b/components/arc/bluetooth/arc_bluetooth_bridge.cc
@@ -1099,11 +1099,6 @@ void ArcBluetoothBridge::RegisterForGattNotification(
     return;
   }
 
-  if (characteristic->IsNotifying()) {
-    callback.Run(mojom::BluetoothGattStatus::GATT_SUCCESS);
-    return;
-  }
-
   characteristic->StartNotifySession(
       base::Bind(&ArcBluetoothBridge::OnGattNotifyStartDone,
                  weak_factory_.GetWeakPtr(), callback,
@@ -1126,11 +1121,6 @@ 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]);