Fix the wrong output device switching caused by an input device being plugged in.

chromeos/audio/cras_audio_handler.h

Index: chromeos/audio/cras_audio_handler.h
diff --git a/chromeos/audio/cras_audio_handler.h b/chromeos/audio/cras_audio_handler.h
index b95f123bb3da5f7c6e6d1c8dadf89c7f2cf418e7..e5e9f665cf32e6fa8a4809f2488b37de38d0a0bb 100644
--- a/chromeos/audio/cras_audio_handler.h
+++ b/chromeos/audio/cras_audio_handler.h
@@ -230,6 +230,10 @@ class CHROMEOS_EXPORT CrasAudioHandler : public CrasAudioClient::Observer,
                                 size_t new_device_size,
                                 uint64 current_active_node);
 
+  // Returns true if there is any device change for for input or output,
+  // specified by |is_input|.
+  bool HasDeviceChange(const AudioNodeList& new_nodes, bool is_input);
+
   // Handles dbus callback for GetNodes.
   void HandleGetNodes(const chromeos::AudioNodeList& node_list, bool success);