bluetooth: mac: add connected LE devices to chooser

device/bluetooth/bluetooth_low_energy_discovery_manager_mac.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef DEVICE_BLUETOOTH_BLUETOOTH_LOW_ENERGY_DISCOVERY_MANAGER_MAC_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_LOW_ENERGY_DISCOVERY_MANAGER_MAC_H_
 
 #if defined(OS_IOS)
 #import <CoreBluetooth/CoreBluetooth.h>
 #else
 #import <IOBluetooth/IOBluetooth.h>
 #endif
 
 #include "base/mac/scoped_nsobject.h"
 #include "base/mac/sdk_forward_declarations.h"
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "device/bluetooth/bluetooth_device.h"
 
 namespace device {
 
 // This class will scan for Bluetooth LE device on Mac.
 class BluetoothLowEnergyDiscoveryManagerMac {
  public:
   // Interface for being notified of events during a device discovery session.
   class Observer {
    public:
     // Called when |this| manager has found a device or an update on a device.
+    // |advertisementData| can be nil if the peripheral is already connected.
     virtual void LowEnergyDeviceUpdated(CBPeripheral* peripheral,
                                         NSDictionary* advertisementData,
                                         int rssi) = 0;
 
    protected:
     virtual ~Observer() {}
   };
 
   virtual ~BluetoothLowEnergyDiscoveryManagerMac();
 
@@ skipping 47 matching lines @@
 
   // List of service UUIDs to scan.
   BluetoothDevice::UUIDList services_uuids_;
 
   DISALLOW_COPY_AND_ASSIGN(BluetoothLowEnergyDiscoveryManagerMac);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_LOW_ENERGY_DISCOVERY_MANAGER_MAC_H_