Bluetooth: macOS: DidModifyServices can happens while scanning

device/bluetooth/bluetooth_device_unittest.cc

Index: device/bluetooth/bluetooth_device_unittest.cc
diff --git a/device/bluetooth/bluetooth_device_unittest.cc b/device/bluetooth/bluetooth_device_unittest.cc
index ab478fc7386df4a49d9bf91a0645488354e48239..9e142f75fc028456e0dfa42ae399312eebfec028 100644
--- a/device/bluetooth/bluetooth_device_unittest.cc
+++ b/device/bluetooth/bluetooth_device_unittest.cc
@@ -465,7 +465,8 @@ TEST_F(BluetoothTest, TwoPendingServiceDiscoveryRequests) {
   // Fist system call to
   // -[id<CBPeripheralDelegate> peripheral:didDiscoverServices:]
   observer.Reset();
-  SimulateDidDiscoverServices(device, {kTestUUIDHeartRate});
+  AddServicesToDevice(device, {kTestUUIDHeartRate});
+  SimulateDidDiscoverServices(device);
   EXPECT_EQ(0, observer.device_changed_count());
   EXPECT_FALSE(device->IsGattServicesDiscoveryComplete());
   EXPECT_EQ(gatt_characteristic_discovery_attempts_, 0);
@@ -513,7 +514,8 @@ TEST_F(BluetoothTest, ExtraDidDiscoverServicesCall) {
 
   // Unexpected system call to
   // -[id<CBPeripheralDelegate> peripheral:didDiscoverServices:]
-  SimulateDidDiscoverServices(device, {kTestUUIDImmediateAlert});
+  AddServicesToDevice(device, {kTestUUIDImmediateAlert});
+  SimulateDidDiscoverServices(device);
   EXPECT_EQ(1, observer.device_changed_count());
   EXPECT_TRUE(device->IsGattServicesDiscoveryComplete());