[Chromecast] Add new volume control API to CastMediaShlib

chromecast/media/cma/backend/multizone_backend_unittest.cc

Index: chromecast/media/cma/backend/multizone_backend_unittest.cc
diff --git a/chromecast/media/cma/backend/multizone_backend_unittest.cc b/chromecast/media/cma/backend/multizone_backend_unittest.cc
index 08f03b421511c48e3b52e4ea9d72746a87b46e1e..edbbb5b74df2509d64171c4291a71c2d56e4f3c5 100644
--- a/chromecast/media/cma/backend/multizone_backend_unittest.cc
+++ b/chromecast/media/cma/backend/multizone_backend_unittest.cc
@@ -27,6 +27,7 @@
 #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/audio_decoder_config.h"
 #include "media/base/decoder_buffer.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -189,7 +190,8 @@ void BufferFeeder::Initialize(float playback_rate) {
       MediaPipelineDeviceParams::kModeIgnorePts,
       effects_only_ ? MediaPipelineDeviceParams::kAudioStreamSoundEffects
                     : MediaPipelineDeviceParams::kAudioStreamNormal,
-      task_runner_.get());
+      task_runner_.get(), AudioContentType::kMedia,
+      ::media::AudioDeviceDescription::kDefaultDeviceId);
   backend_.reset(CastMediaShlib::CreateMediaPipelineBackend(params));
   CHECK(backend_);