Revert of Initialize default audio device ID with explicit device ID.

content/browser/renderer_host/media/media_stream_manager.h

Index: content/browser/renderer_host/media/media_stream_manager.h
diff --git a/content/browser/renderer_host/media/media_stream_manager.h b/content/browser/renderer_host/media/media_stream_manager.h
index 1b6c79f0d09460e9b80749845c56b9726048187c..b3a5cecf8d2fd01c9103f59cf24732e0535165b1 100644
--- a/content/browser/renderer_host/media/media_stream_manager.h
+++ b/content/browser/renderer_host/media/media_stream_manager.h
@@ -367,8 +367,7 @@
   // valid alternate device ID.
   // Returns false if the required device ID is present and invalid.
   // Otherwise, if no valid device is found, device_id is unchanged.
-  bool PickDeviceId(MediaStreamType type,
-                    const std::string& salt,
+  bool PickDeviceId(const std::string& salt,
                     const url::Origin& security_origin,
                     const TrackControls& controls,
                     const MediaDeviceInfoArray& devices,