bluetooth: macOS: Support for extra didConnectPeripheral event from macOS.

device/bluetooth/bluetooth_low_energy_device_mac.h

Index: device/bluetooth/bluetooth_low_energy_device_mac.h
diff --git a/device/bluetooth/bluetooth_low_energy_device_mac.h b/device/bluetooth/bluetooth_low_energy_device_mac.h
index e2823d16eded4be599c5ab404dc5cc1d93a166ba..fd76e679e4ee2f6750b33c4a2d50af59254d6333 100644
--- a/device/bluetooth/bluetooth_low_energy_device_mac.h
+++ b/device/bluetooth/bluetooth_low_energy_device_mac.h
@@ -110,7 +110,10 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothLowEnergyDeviceMac
   friend class BluetoothTestMac;
   friend class BluetoothRemoteGattServiceMac;
 
-  // Calls the macOS to discover primary services.
+  // Called by the adapter when the device is connected.
+  void DidConnectPeripheral();
+
+  // Calls macOS to discover primary services.
   void DiscoverPrimaryServices();
 
   // Sends notification if this device is ready with all services discovered.
@@ -143,6 +146,9 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothLowEnergyDeviceMac
   // Whether the device is connectable.
   bool connectable_;
 
+  // Whether the device is connected.
+  bool connected_;
+
   // The peripheral's identifier, as returned by [CBPeripheral identifier].
   std::string identifier_;