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 d5493b2755dd74ac3b46e96f876791d76272973c..63e392c4bbf5fe5860ee6aab7b8ea9599a9c4aa7 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.
@@ -140,6 +143,9 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothLowEnergyDeviceMac
   base::scoped_nsobject<BluetoothLowEnergyPeripheralDelegate>
       peripheral_delegate_;
 
+  // Whether the device is connected.
+  bool connected_;
+
   // The peripheral's identifier, as returned by [CBPeripheral identifier].
   std::string identifier_;