Make LoadObserver settable per video send stream. Gives client flexibility and makes the implementa…

webrtc/call.h

Index: webrtc/call.h
diff --git a/webrtc/call.h b/webrtc/call.h
index 97226a0e5ccba289159c17e4e03b3e72d83f5ce5..160a918cb2bfcd4b42cacf27a41f45adde271a13 100644
--- a/webrtc/call.h
+++ b/webrtc/call.h
@@ -74,10 +74,6 @@ class Call {
     // VoiceEngine used for audio/video synchronization for this Call.
     VoiceEngine* voice_engine = nullptr;
 
-    // Callback for overuse and normal usage based on the jitter of incoming
-    // captured frames. 'nullptr' disables the callback.
-    LoadObserver* overuse_callback = nullptr;
-
     // Bitrate config used until valid bitrate estimates are calculated. Also
     // used to cap total bitrate used.
     struct BitrateConfig {