Looking up device id by session id for AudioRendererMixerInput

media/audio/audio_manager_base.cc

Index: media/audio/audio_manager_base.cc
diff --git a/media/audio/audio_manager_base.cc b/media/audio/audio_manager_base.cc
index 9e884423bee84a514f6835e23b65a7c52e148d9c..8a6acc2e7bc89afafedffcb1e857f3c653063028 100644
--- a/media/audio/audio_manager_base.cc
+++ b/media/audio/audio_manager_base.cc
@@ -77,10 +77,18 @@ class AudioManagerBase::CompareByParams {
   const DispatcherParams* dispatcher_;
 };
 
-static bool IsDefaultDeviceId(const std::string& device_id) {
+// static
+bool AudioManagerBase::IsDefaultDeviceId(const std::string& device_id) {
   return device_id.empty() || device_id == AudioManagerBase::kDefaultDeviceId;
 }
 
+// static
+bool AudioManagerBase::UseSessionIdToSelectDevice(
+    int session_id,
+    const std::string& device_id) {
+  return session_id && device_id.empty();
+}
+
 AudioManagerBase::AudioManagerBase(AudioLogFactory* audio_log_factory)
     : max_num_output_streams_(kDefaultMaxOutputStreams),
       max_num_input_streams_(kDefaultMaxInputStreams),