Implement periodic bandwidth probing in application-limited region.

webrtc/media/base/mediachannel.h

Index: webrtc/media/base/mediachannel.h
diff --git a/webrtc/media/base/mediachannel.h b/webrtc/media/base/mediachannel.h
index 80b9d4d44c23fb1fdd0c9a7d58ec3fe4401d9436..75aedb07d8dec18ea996c620ee0adc5d043444ae 100644
--- a/webrtc/media/base/mediachannel.h
+++ b/webrtc/media/base/mediachannel.h
@@ -129,6 +129,9 @@ struct MediaConfig {
     // VideoReceiveStream, where the value is passed on to the
     // IncomingVideoStream constructor.
     bool disable_prerenderer_smoothing = false;
+
+    // Enables periodic bandwidth probing in application-limited region.
+    bool periodic_alr_bandwidth_probing = false;
   } video;
 };