[Chromecast] Process streams with different post-processing.

chromecast/media/cma/backend/alsa/media_pipeline_backend_alsa.cc

Index: chromecast/media/cma/backend/alsa/media_pipeline_backend_alsa.cc
diff --git a/chromecast/media/cma/backend/alsa/media_pipeline_backend_alsa.cc b/chromecast/media/cma/backend/alsa/media_pipeline_backend_alsa.cc
index 8c33d6b79316d5d9b95d3f24b8a8f540943a427b..3c609c5ea9135c0ef59cb3c9509b7815b49e719e 100644
--- a/chromecast/media/cma/backend/alsa/media_pipeline_backend_alsa.cc
+++ b/chromecast/media/cma/backend/alsa/media_pipeline_backend_alsa.cc
@@ -98,6 +98,10 @@ bool MediaPipelineBackendAlsa::Primary() const {
           MediaPipelineDeviceParams::kAudioStreamSoundEffects);
 }
 
+std::string MediaPipelineBackendAlsa::Name() const {
+  return params_.name;
+}
+
 const scoped_refptr<base::SingleThreadTaskRunner>&
 MediaPipelineBackendAlsa::GetTaskRunner() const {
   return static_cast<TaskRunnerImpl*>(params_.task_runner)->runner();