Exposes a shlib interface for media/audio path.

chromecast/media/audio/BUILD.gn

+# Copyright 2015 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("//chromecast/chromecast.gni")
+
+source_set("audio") {
+  sources = [
+    "cast_audio_manager.cc",
+    "cast_audio_manager.h",
+    "cast_audio_manager_factory.cc",
+    "cast_audio_manager_factory.h",
+    "chromecast_device_audio_output_stream.cc",
+    "chromecast_device_audio_output_stream.h",
+  ]
+
+  deps = [
+    "//base",
+    "//media",
+  ]
+
+  configs += [ "//chromecast:config" ]
+}