Implement HasInputDevices in CrasAudioManager

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 3a86d8676ff483bb52be7955b979ba21ad5de1bf..88bdc4500f87a8bb144dc5855e5542361d933933 100644
--- a/chromeos/audio/cras_audio_handler.cc
+++ b/chromeos/audio/cras_audio_handler.cc
@@ -903,6 +903,18 @@ void CrasAudioHandler::UpdateDevicesAndSwitchActive(
   }
 }
 
+void CrasAudioHandler::UpdateAudioManagerHasInputDevices() {
+  AudioDeviceList devices;
+  GetAudioDevices(&devices);
+  for (size_t i = 0; i < devices.size(); ++i) {
+    if (devices[i].is_input && devices[i].is_for_simple_usage) {
+      media::AudioManager::Get()->SetHasInputDevices(true);
+      return;
+    }
+  }
+  media::AudioManager::Get()->SetHasInputDevices(false);
+}
+
 void CrasAudioHandler::HandleGetNodes(const chromeos::AudioNodeList& node_list,
                                       bool success) {
   if (!success) {
@@ -911,6 +923,7 @@ void CrasAudioHandler::HandleGetNodes(const chromeos::AudioNodeList& node_list,
   }
 
   UpdateDevicesAndSwitchActive(node_list);
+  UpdateAudioManagerHasInputDevices();
   FOR_EACH_OBSERVER(AudioObserver, observers_, OnAudioNodesChanged());
 }