Movable support for VideoReceiveStream::Config and avoid copies

webrtc/video/receive_statistics_proxy.cc

Index: webrtc/video/receive_statistics_proxy.cc
diff --git a/webrtc/video/receive_statistics_proxy.cc b/webrtc/video/receive_statistics_proxy.cc
index 4757efa81b6cf3435212fea2f3e4dbb53d283734..7fa39612e929ebc96c87e3ecff5bbdddbf74c1e0 100644
--- a/webrtc/video/receive_statistics_proxy.cc
+++ b/webrtc/video/receive_statistics_proxy.cc
@@ -20,17 +20,17 @@
 namespace webrtc {
 
 ReceiveStatisticsProxy::ReceiveStatisticsProxy(
-    const VideoReceiveStream::Config& config,
+    const VideoReceiveStream::Config* config,
     Clock* clock)
     : clock_(clock),
-      config_(config),
+      config_(*config),
       // 1000ms window, scale 1000 for ms to s.
       decode_fps_estimator_(1000, 1000),
       renders_fps_estimator_(1000, 1000),
       render_fps_tracker_(100, 10u),
       render_pixel_tracker_(100, 10u) {
-  stats_.ssrc = config.rtp.remote_ssrc;
-  for (auto it : config.rtp.rtx)
+  stats_.ssrc = config_.rtp.remote_ssrc;
+  for (auto it : config_.rtp.rtx)
     rtx_stats_[it.second.ssrc] = StreamDataCounters();
 }