audio_device: Add lineout node type

chromeos/audio/audio_device.h

Index: chromeos/audio/audio_device.h
diff --git a/chromeos/audio/audio_device.h b/chromeos/audio/audio_device.h
index 724798c0d9e6d0295a4f86bda0299672d939a257..5ee28b96c019829882abc9e0c442cfa8812e734f 100644
--- a/chromeos/audio/audio_device.h
+++ b/chromeos/audio/audio_device.h
@@ -27,6 +27,7 @@ enum AudioDeviceType {
   AUDIO_TYPE_INTERNAL_MIC,
   AUDIO_TYPE_KEYBOARD_MIC,
   AUDIO_TYPE_HOTWORD,
+  AUDIO_TYPE_LINEOUT,
   AUDIO_TYPE_POST_MIX_LOOPBACK,
   AUDIO_TYPE_POST_DSP_LOOPBACK,
   AUDIO_TYPE_OTHER,
@@ -54,7 +55,8 @@ struct CHROMEOS_EXPORT AudioDevice {
             type == AUDIO_TYPE_USB ||
             type == AUDIO_TYPE_BLUETOOTH ||
             type == AUDIO_TYPE_HDMI ||
-            type == AUDIO_TYPE_INTERNAL_SPEAKER);
+            type == AUDIO_TYPE_INTERNAL_SPEAKER ||
+            type == AUDIO_TYPE_LINEOUT);
   }
 
   bool is_input;