bluetooth: mac: add connected LE devices to chooser

device/bluetooth/test/bluetooth_test_mac.mm

Index: device/bluetooth/test/bluetooth_test_mac.mm
diff --git a/device/bluetooth/test/bluetooth_test_mac.mm b/device/bluetooth/test/bluetooth_test_mac.mm
index d7e6f4b63ad6020d8ebfeed19d13e4afb3bd52ee..1ac1174950c43f3ac1fb1e80f11026787e9dee8e 100644
--- a/device/bluetooth/test/bluetooth_test_mac.mm
+++ b/device/bluetooth/test/bluetooth_test_mac.mm
@@ -144,6 +144,18 @@ void BluetoothTestMac::InitWithFakeAdapter() {
   }
 }
 
+void BluetoothTestMac::SimulateConnectedLowEnergyDevice() {
+  const char* identifier;
+  NSString* name;
+  identifier = kTestPeripheralUUID1.c_str();
+  name = @(kTestDeviceName.c_str());
+  scoped_nsobject<MockCBPeripheral> mock_peripheral([[MockCBPeripheral alloc]
+      initWithUTF8StringIdentifier:identifier
+                              name:name]);
+  mock_peripheral.get().bluetoothTestMac = this;
+  [mock_central_manager_->get() addConnectedMockPeripheral:mock_peripheral];
+}
+
 BluetoothDevice* BluetoothTestMac::SimulateLowEnergyDevice(int device_ordinal) {
   TestBluetoothAdapterObserver observer(adapter_);
   CBCentralManager* central_manager = adapter_mac_->low_energy_central_manager_;