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..0edb5f28c6df9d8187fe7d9b9a1b406e7839c0ee 100644
--- a/device/bluetooth/test/bluetooth_test_mac.mm
+++ b/device/bluetooth/test/bluetooth_test_mac.mm
@@ -8,6 +8,7 @@
 
 #include "base/mac/foundation_util.h"
 #include "base/strings/string_number_conversions.h"
+#include "base/strings/sys_string_conversions.h"
 #include "build/build_config.h"
 #include "device/bluetooth/bluetooth_adapter_mac.h"
 #include "device/bluetooth/bluetooth_device_mac.h"
@@ -144,6 +145,39 @@ void BluetoothTestMac::InitWithFakeAdapter() {
   }
 }
 
+void BluetoothTestMac::SimulateConnectedLowEnergyDevice(
+    int device_ordinal,
+    const BluetoothDevice::UUIDSet& service_uuids) {
+  const char* identifier = NULL;
+  NSString* name;
+  switch (device_ordinal) {
+    case 1:
+      identifier = kTestPeripheralUUID1.c_str();
+      break;
+    case 2:
+      identifier = kTestPeripheralUUID2.c_str();
+      break;
+    default:
+      NOTREACHED() << "SimulateLowEnergyDevice not implemented for "
+                   << device_ordinal;
+  }
+  name = @(kTestDeviceName.c_str());
+  scoped_nsobject<MockCBPeripheral> mock_peripheral([[MockCBPeripheral alloc]
+      initWithUTF8StringIdentifier:identifier
+                              name:name]);
+  mock_peripheral.get().bluetoothTestMac = this;
+  scoped_nsobject<NSMutableSet> cbUUIDs([[NSMutableSet alloc] init]);
+  for (auto iterator = service_uuids.begin(); iterator != service_uuids.end();
+       ++iterator) {
+    NSString* uuidString =
+        base::SysUTF8ToNSString(iterator->canonical_value().c_str());
+    [cbUUIDs.get() addObject:[CBUUID UUIDWithString:uuidString]];
+  }
+  [mock_central_manager_->get()
+      setConnectedMockPeripheral:mock_peripheral.get().peripheral
+                withServiceUUIDs:cbUUIDs.get()];
+}
+
 BluetoothDevice* BluetoothTestMac::SimulateLowEnergyDevice(int device_ordinal) {
   TestBluetoothAdapterObserver observer(adapter_);
   CBCentralManager* central_manager = adapter_mac_->low_energy_central_manager_;