Add BluetoothGattCharacteristicTest::StartNotifySession_Reentrant unit test

device/bluetooth/test/bluetooth_test_win.cc

Index: device/bluetooth/test/bluetooth_test_win.cc
diff --git a/device/bluetooth/test/bluetooth_test_win.cc b/device/bluetooth/test/bluetooth_test_win.cc
index 7596bb3be6012db2c4bfa89fe52196571c22d6a2..9295fcb67c30ec0da9f09c18fe38c75de91fe377 100644
--- a/device/bluetooth/test/bluetooth_test_win.cc
+++ b/device/bluetooth/test/bluetooth_test_win.cc
@@ -369,6 +369,16 @@ void BluetoothTestWin::SimulateGattNotifySessionStarted(
   FinishPendingTasks();
 }
 
+void BluetoothTestWin::
+    SimulateGattCharacteristicSetNotifyWillFailAsynchronouslyOnce(
+        BluetoothGattCharacteristic* characteristic) {
+  win::GattCharacteristic* simulated_characteristic =
+      GetSimulatedCharacteristic(characteristic);
+  CHECK(simulated_characteristic);
+  fake_bt_le_wrapper_->SimulateGattCharacteristicSetNotifyError(
+      simulated_characteristic, E_BLUETOOTH_ATT_UNKNOWN_ERROR);
+}
+
 void BluetoothTestWin::SimulateGattCharacteristicChanged(
     BluetoothGattCharacteristic* characteristic,
     const std::vector<uint8_t>& value) {