Delete unused BluetoothAudioSink code.

device/bluetooth/bluetooth_adapter_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_ADAPTER_MAC_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_ADAPTER_MAC_H_
 
 #include <IOKit/IOReturn.h>
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/containers/hash_tables.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "device/bluetooth/bluetooth_adapter.h"
-#include "device/bluetooth/bluetooth_audio_sink.h"
 #include "device/bluetooth/bluetooth_discovery_manager_mac.h"
 #include "device/bluetooth/bluetooth_export.h"
 #include "device/bluetooth/bluetooth_low_energy_device_mac.h"
 #include "device/bluetooth/bluetooth_low_energy_discovery_manager_mac.h"
 #include "device/bluetooth/bluetooth_uuid.h"
 
 @class CBUUID;
 @class IOBluetoothDevice;
 @class NSArray;
 @class NSDate;
@@ skipping 43 matching lines @@
   void CreateRfcommService(
       const BluetoothUUID& uuid,
       const ServiceOptions& options,
       const CreateServiceCallback& callback,
       const CreateServiceErrorCallback& error_callback) override;
   void CreateL2capService(
       const BluetoothUUID& uuid,
       const ServiceOptions& options,
       const CreateServiceCallback& callback,
       const CreateServiceErrorCallback& error_callback) override;
-  void RegisterAudioSink(
-      const BluetoothAudioSink::Options& options,
-      const AcquiredCallback& callback,
-      const BluetoothAudioSink::ErrorCallback& error_callback) override;
   void RegisterAdvertisement(
       std::unique_ptr<BluetoothAdvertisement::Data> advertisement_data,
       const CreateAdvertisementCallback& callback,
       const AdvertisementErrorCallback& error_callback) override;
   BluetoothLocalGattService* GetGattService(
       const std::string& identifier) const override;
 
   // BluetoothDiscoveryManagerMac::Observer overrides:
   void ClassicDeviceFound(IOBluetoothDevice* device) override;
   void ClassicDiscoveryStopped(bool unexpected) override;
@@ skipping 106 matching lines @@
   scoped_refptr<base::SequencedTaskRunner> ui_task_runner_;
 
   base::WeakPtrFactory<BluetoothAdapterMac> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BluetoothAdapterMac);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_ADAPTER_MAC_H_