[Chromecast] Add new volume control API to CastMediaShlib

chromecast/media/audio/cast_audio_output_stream.cc

Index: chromecast/media/audio/cast_audio_output_stream.cc
diff --git a/chromecast/media/audio/cast_audio_output_stream.cc b/chromecast/media/audio/cast_audio_output_stream.cc
index 654c4b4b9b0c40a6d4fa797bd6e5de28a87a9ab6..9cf872f4e20934ca2829942d460db2b1d25cb7b0 100644
--- a/chromecast/media/audio/cast_audio_output_stream.cc
+++ b/chromecast/media/audio/cast_audio_output_stream.cc
@@ -13,9 +13,11 @@
 #include "chromecast/base/task_runner_impl.h"
 #include "chromecast/media/audio/cast_audio_manager.h"
 #include "chromecast/media/cma/base/decoder_buffer_adapter.h"
+#include "chromecast/public/cast_media_shlib.h"
 #include "chromecast/public/media/decoder_config.h"
 #include "chromecast/public/media/media_pipeline_backend.h"
 #include "chromecast/public/media/media_pipeline_device_params.h"
+#include "media/audio/audio_device_description.h"
 #include "media/base/decoder_buffer.h"
 
 namespace {
@@ -48,7 +50,8 @@ class CastAudioOutputStream::Backend
     MediaPipelineDeviceParams device_params(
         MediaPipelineDeviceParams::kModeIgnorePts,
         MediaPipelineDeviceParams::kAudioStreamSoundEffects,
-        backend_task_runner_.get());
+        backend_task_runner_.get(), AudioContentType::kMedia,
+        ::media::AudioDeviceDescription::kDefaultDeviceId);
     backend_ = audio_manager->CreateMediaPipelineBackend(device_params);
     if (!backend_)
       return false;