device/bluetooth:Implement Register() for BluetoothAudioSinkChromeOS.

chromeos/dbus/fake_bluetooth_media_client.h

 // Copyright 2014 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 CHROMEOS_DBUS_FAKE_BLUETOOTH_MEDIA_CLIENT_H_
 #define CHROMEOS_DBUS_FAKE_BLUETOOTH_MEDIA_CLIENT_H_
 
 #include "base/callback.h"
 #include "base/observer_list.h"
 #include "chromeos/chromeos_export.h"
 #include "chromeos/dbus/bluetooth_media_client.h"
 #include "dbus/object_path.h"
 
 namespace chromeos {
 
 class CHROMEOS_EXPORT FakeBluetoothMediaClient : public BluetoothMediaClient {
  public:
+  // The default codec is SBC(0x00).
+  static const uint8_t kDefaultCodec;
+
   FakeBluetoothMediaClient();
   ~FakeBluetoothMediaClient() override;
 
   // DBusClient override.
   void Init(dbus::Bus* bus) override;
 
   // BluetoothMediaClient overrides.
   void AddObserver(BluetoothMediaClient::Observer* observer) override;
   void RemoveObserver(BluetoothMediaClient::Observer* observer) override;
   void RegisterEndpoint(const dbus::ObjectPath& object_path,
                         const dbus::ObjectPath& endpoint_path,
                         const EndpointProperties& properties,
                         const base::Closure& callback,
                         const ErrorCallback& error_callback) override;
   void UnregisterEndpoint(const dbus::ObjectPath& object_path,
                           const dbus::ObjectPath& endpoint_path,
                           const base::Closure& callback,
                           const ErrorCallback& error_callback) override;
 
  private:
   // List of observers interested in event notifications from us.
   ObserverList<BluetoothMediaClient::Observer> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeBluetoothMediaClient);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_DBUS_FAKE_BLUETOOTH_MEDIA_CLIENT_H_