Revert of [Chromecast] Process streams with different post-processing.

chromecast/public/media/media_pipeline_device_params.h

Index: chromecast/public/media/media_pipeline_device_params.h
diff --git a/chromecast/public/media/media_pipeline_device_params.h b/chromecast/public/media/media_pipeline_device_params.h
index 4e1a64d9737a5a19183236fefa71cc1a45ee077d..680da27cd25f9761209090867bb07ad37d56b041 100644
--- a/chromecast/public/media/media_pipeline_device_params.h
+++ b/chromecast/public/media/media_pipeline_device_params.h
@@ -55,20 +55,8 @@
         audio_type(audio_type_in),
         task_runner(task_runner_in) {}
 
-  // |device_id_in| should be from media/audio/audio_device_description.h or
-  // chromecast/media/base/audio_device_ids.h
-  MediaPipelineDeviceParams(MediaSyncType sync_type_in,
-                            AudioStreamType audio_type_in,
-                            const std::string& device_id_in,
-                            TaskRunner* task_runner_in)
-      : sync_type(sync_type_in),
-        audio_type(audio_type_in),
-        device_id(device_id_in),
-        task_runner(task_runner_in) {}
-
   const MediaSyncType sync_type;
   const AudioStreamType audio_type;
-  const std::string device_id;
 
   // task_runner allows backend implementations to post tasks to the media
   // thread.  Since all calls from cast_shell into the backend are made on