Fix use-after-scope issue in audio_renderer_impl.

media/renderers/audio_renderer_impl.cc

Index: media/renderers/audio_renderer_impl.cc
diff --git a/media/renderers/audio_renderer_impl.cc b/media/renderers/audio_renderer_impl.cc
index c924195fc81a4b5f0a4f43eb0f1afd882415a38e..4899be0a4b98470bf59c19947695bf431bb11610 100644
--- a/media/renderers/audio_renderer_impl.cc
+++ b/media/renderers/audio_renderer_impl.cc
@@ -344,8 +344,8 @@ void AudioRendererImpl::Initialize(DemuxerStream* stream,
   // failed.
   init_cb_ = BindToCurrentLoop(init_cb);
 
-  const AudioParameters& hw_params =
-      sink_->GetOutputDeviceInfo().output_params();
+  auto output_device_info = sink_->GetOutputDeviceInfo();
+  const AudioParameters& hw_params = output_device_info.output_params();
   expecting_config_changes_ = stream->SupportsConfigChanges();
   if (!expecting_config_changes_ || !hw_params.IsValid() ||
       hw_params.format() == AudioParameters::AUDIO_FAKE) {