Exposes a shlib interface for media/audio path.

chromecast/media/audio/BUILD.gn

Index: chromecast/media/audio/BUILD.gn
diff --git a/chromecast/media/cma/filters/BUILD.gn b/chromecast/media/audio/BUILD.gn
similarity index 50%
copy from chromecast/media/cma/filters/BUILD.gn
copy to chromecast/media/audio/BUILD.gn
index 605075533f9461e32f5ec3ffc1f7c4430f28d63f..78dbdb664776bc9216625902ea81e7d279c947f4 100644
--- a/chromecast/media/cma/filters/BUILD.gn
+++ b/chromecast/media/audio/BUILD.gn
@@ -2,17 +2,20 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-source_set("filters") {
+import("//chromecast/chromecast.gni")
+
+source_set("audio") {
   sources = [
-    "cma_renderer.cc",
-    "cma_renderer.h",
-    "demuxer_stream_adapter.cc",
-    "demuxer_stream_adapter.h",
+    "cast_audio_manager.cc",
+    "cast_audio_manager.h",
+    "cast_audio_manager_factory.cc",
+    "cast_audio_manager_factory.h",
+    "cast_audio_output_stream.cc",
+    "cast_audio_output_stream.h",
   ]
 
   deps = [
     "//base",
-    "//chromecast/media/cma/base",
     "//media",
   ]