Fix the issue where the active output device is lost after the device suspend/resume without any ac…

chromeos/audio/cras_audio_handler.cc

Index: chromeos/audio/cras_audio_handler.cc
diff --git a/chromeos/audio/cras_audio_handler.cc b/chromeos/audio/cras_audio_handler.cc
index 52af951687b3b267ae360f4fd6dabb977c613332..3a86d8676ff483bb52be7955b979ba21ad5de1bf 100644
--- a/chromeos/audio/cras_audio_handler.cc
+++ b/chromeos/audio/cras_audio_handler.cc
@@ -852,10 +852,13 @@ void CrasAudioHandler::UpdateDevicesAndSwitchActive(
   }
 
   // If the previous active device is removed from the new node list,
-  // reset active_output_node_id_.
-  if (!GetDeviceFromId(active_output_node_id_))
+  // or changed to inactive by cras, reset active_output_node_id_.
+  // See crbug.com/478968.
+  const AudioDevice* active_output = GetDeviceFromId(active_output_node_id_);
+  if (!active_output || !active_output->active)
     active_output_node_id_ = 0;
-  if (!GetDeviceFromId(active_input_node_id_))
+  const AudioDevice* active_input = GetDeviceFromId(active_input_node_id_);
+  if (!active_input || !active_input->active)
     active_input_node_id_ = 0;
 
   // If audio nodes change is caused by unplugging some non-active audio