device/bluetooth: Add Bluetooth Audio Sink base class.

device/bluetooth/BUILD.gn

 # 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.
 
 import("//tools/grit/grit_rule.gni")
 
 config("bluetooth_config") {
   if (is_win) {
     ldflags = [
       # Despite MSDN stating that Bthprops.dll contains the
       # symbols declared by bthprops.lib, they actually reside here:
       "/DELAYLOAD:Bthprops.cpl",
       "/DELAYLOAD:setupapi.dll",
     ]
   }
 }
 
 static_library("bluetooth") {
   sources = [
     "bluetooth_adapter.cc",
     "bluetooth_adapter.h",
     "bluetooth_adapter_chromeos.cc",
     "bluetooth_adapter_chromeos.h",
     "bluetooth_adapter_factory.cc",
     "bluetooth_adapter_factory.h",
     "bluetooth_adapter_mac.h",
     "bluetooth_adapter_mac.mm",
     "bluetooth_adapter_win.cc",
     "bluetooth_adapter_win.h",
+    "bluetooth_audio_sink.cc",
+    "bluetooth_audio_sink.h",
     "bluetooth_channel_mac.mm",
     "bluetooth_channel_mac.h",
     "bluetooth_device.cc",
     "bluetooth_device.h",
     "bluetooth_device_chromeos.cc",
     "bluetooth_device_chromeos.h",
     "bluetooth_device_mac.h",
     "bluetooth_device_mac.mm",
     "bluetooth_device_win.cc",
     "bluetooth_device_win.h",
@@ skipping 154 matching lines @@
     "test/mock_bluetooth_gatt_service.h",
     "test/mock_bluetooth_socket.cc",
     "test/mock_bluetooth_socket.h",
   ]
 
   deps = [
     ":bluetooth",
     "//testing/gmock",
   ]
 }