device/bluetooth: Implement Unregister() of BlueotoothAudioSinkChromeOS and disconnection-related c…

device/bluetooth/bluetooth_audio_sink.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 DEVICE_BLUETOOTH_BLUETOOTH_AUDIO_SINK_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_AUDIO_SINK_H_
 
 #include <stdint.h>
 #include <string>
 #include <vector>
@@ skipping 22 matching lines @@
     STATE_INVALID,  // BluetoothAdapter not presented or not powered.
     STATE_DISCONNECTED,  // Not connected.
     STATE_IDLE,  // Connected but not streaming.
     STATE_PENDING,  // Connected, streaming but not acquired.
     STATE_ACTIVE,  // Connected, streaming and acquired.
   };
 
   // Possible types of error raised by Audio Sink object.
   enum ErrorCode {
     ERROR_UNSUPPORTED_PLATFORM,  // A2DP sink not supported on current platform.
-    ERROR_INVALID_ADAPTER,       // BluetoothAdapter not presented/powered.
-    ERROR_NOT_REGISTERED,        // BluetoothAudioSink not registered.
+    ERROR_INVALID_ADAPTER,  // BluetoothAdapter not present/powered.
+    ERROR_NOT_REGISTERED,  // BluetoothAudioSink not registered.
+    ERROR_NOT_UNREGISTERED,  // BluetoothAudioSink not unregistered.
   };
 
   // Options to configure an A2DP audio sink.
   struct Options {
     Options();
     ~Options();
 
     uint8_t codec;
     std::vector<uint8_t> capabilities;
   };
@@ skipping 50 matching lines @@
   // unregistered even if the user applications fail to do so.
   virtual ~BluetoothAudioSink();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BluetoothAudioSink);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_AUDIO_SINK_H_