bluetooth: mac: add connected LE devices to chooser

device/bluetooth/bluetooth_adapter.h

Index: device/bluetooth/bluetooth_adapter.h
diff --git a/device/bluetooth/bluetooth_adapter.h b/device/bluetooth/bluetooth_adapter.h
index ea2b48c8efeb12053356766e9bcfe88f0d3a201f..fc915b9034ea904e737f786046cb4a48dd3a2fd5 100644
--- a/device/bluetooth/bluetooth_adapter.h
+++ b/device/bluetooth/bluetooth_adapter.h
@@ -317,6 +317,11 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothAdapter
   // Indicates whether the adapter is currently discovering new devices.
   virtual bool IsDiscovering() const = 0;
 
+  // This function get add all the connected peripherals into |devices_|.
+  // TODO(crbug.com/653032): Needs to be implemented for Android, ChromeOS and
+  // Windows.
+  virtual void RetrievedConnectedPeripherals() {}
+
   // Requests the adapter to start a new discovery session. On success, a new
   // instance of BluetoothDiscoverySession will be returned to the caller via
   // |callback| and the adapter will be discovering nearby Bluetooth devices.