Implement MojoAudioRendererSink and use it in UtilityMojoMediaClient

media/mojo/services/mojo_renderer_service.cc

Index: media/mojo/services/mojo_renderer_service.cc
diff --git a/media/mojo/services/mojo_renderer_service.cc b/media/mojo/services/mojo_renderer_service.cc
index 239e58f3b0174fb1978feb258ffb18293bd4bbe8..7160afd54cb88d3afc621d7d3535288f3228d904 100644
--- a/media/mojo/services/mojo_renderer_service.cc
+++ b/media/mojo/services/mojo_renderer_service.cc
@@ -15,6 +15,7 @@
 #include "media/base/renderer.h"
 #include "media/base/video_renderer_sink.h"
 #include "media/mojo/services/demuxer_stream_provider_shim.h"
+#include "media/mojo/services/mojo_audio_renderer_sink_adapter.h"
 #include "media/mojo/services/mojo_cdm_service_context.h"
 #include "media/mojo/services/mojo_video_renderer_sink_adapter.h"
 
@@ -80,6 +81,7 @@ void MojoRendererService::Initialize(
     mojom::RendererClientAssociatedPtrInfo client,
     mojom::DemuxerStreamPtr audio,
     mojom::DemuxerStreamPtr video,
+    mojom::AudioRendererSinkPtr audio_renderer_sink_ptr,
     mojom::VideoRendererSinkPtr video_renderer_sink_ptr,
     const base::Optional<GURL>& media_url,
     const base::Optional<GURL>& first_party_for_cookies,
@@ -90,6 +92,11 @@ void MojoRendererService::Initialize(
   client_.Bind(std::move(client));
   state_ = STATE_INITIALIZING;
 
+  if (audio_renderer_sink_ptr) {
+    static_cast<MojoAudioRendererSinkAdapter*>(audio_sink_.get())
+        ->SetClient(std::move(audio_renderer_sink_ptr));
+  }
+
   if (video_renderer_sink_ptr) {
     static_cast<MojoVideoRendererSinkAdapter*>(video_sink_.get())
         ->Initialize(std::move(video_renderer_sink_ptr));