bluetooth: mac: add connected LE devices to chooser

device/bluetooth/bluetooth_adapter_unittest.cc

Index: device/bluetooth/bluetooth_adapter_unittest.cc
diff --git a/device/bluetooth/bluetooth_adapter_unittest.cc b/device/bluetooth/bluetooth_adapter_unittest.cc
index 24a77b7f51ab66dec6ec0ffa936877f4c261624d..9e6bac217f589f2fb01f075a3b984b64af595745 100644
--- a/device/bluetooth/bluetooth_adapter_unittest.cc
+++ b/device/bluetooth/bluetooth_adapter_unittest.cc
@@ -870,4 +870,23 @@ TEST_F(BluetoothTest, RemoveOutdatedDeviceGattConnect) {
 }
 #endif  // defined(OS_ANDROID) || defined(OS_MACOSX)
 
+#if defined(OS_MACOSX)
+// Simulate a device being connected before starting discovery session.
+TEST_F(BluetoothTest, DiscoverConnectedLowEnergyDevice) {
+  if (!PlatformSupportsLowEnergy()) {
+    LOG(WARNING) << "Low Energy Bluetooth unavailable, skipping unit test.";
+    return;
+  }
+  InitWithFakeAdapter();
+  TestBluetoothAdapterObserver observer(adapter_);
+
+  SimulateConnectedLowEnergyDevice();
+  // Start discovery and find a device.
+  StartLowEnergyDiscoverySession();
+  SimulateLowEnergyDevice(4);
+  EXPECT_EQ(2, observer.device_added_count());
+  EXPECT_EQ(2u, adapter_->GetDevices().size());
+}
+#endif  // defined(OS_MACOSX)
+
 }  // namespace device