bluetooth: mac: Improve classic device discovery and update

device/bluetooth/bluetooth_classic_device_mac.h

 // Copyright 2013 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_CLASSIC_DEVICE_MAC_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_CLASSIC_DEVICE_MAC_H_
 
 #import <IOBluetooth/IOBluetooth.h>
 #include <stdint.h>
 
@@ skipping 55 matching lines @@
       const ConnectToServiceCallback& callback,
       const ConnectToServiceErrorCallback& error_callback) override;
   void ConnectToServiceInsecurely(
       const BluetoothUUID& uuid,
       const ConnectToServiceCallback& callback,
       const ConnectToServiceErrorCallback& error_callback) override;
   void CreateGattConnection(
       const GattConnectionCallback& callback,
       const ConnectErrorCallback& error_callback) override;
 
-  base::Time GetLastUpdateTime() const;
+  base::Time GetLastUpdateTime() const override;
 
   // Returns the Bluetooth address for the |device|. The returned address has a
   // normalized format (see below).
   static std::string GetDeviceAddress(IOBluetoothDevice* device);
 
  protected:
   // BluetoothDevice override
   void CreateGattConnectionImpl() override;
   void DisconnectGatt() override;
 
  private:
   friend class BluetoothAdapterMac;
 
   // Implementation to read the host's transmit power level of type
   // |power_level_type|.
   int GetHostTransmitPower(
       BluetoothHCITransmitPowerLevelType power_level_type) const;
 
   base::scoped_nsobject<IOBluetoothDevice> device_;
 
   DISALLOW_COPY_AND_ASSIGN(BluetoothClassicDeviceMac);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_CLASSIC_DEVICE_MAC_H_