Fix for stats updated twice when switching content type.

webrtc/video/send_statistics_proxy.cc

Index: webrtc/video/send_statistics_proxy.cc
diff --git a/webrtc/video/send_statistics_proxy.cc b/webrtc/video/send_statistics_proxy.cc
index 0a84439825e8af1706a16bc0ba632fb17ccf5f21..d2964b21dae4c101ae6ba8cbd36ec1fbc0950946 100644
--- a/webrtc/video/send_statistics_proxy.cc
+++ b/webrtc/video/send_statistics_proxy.cc
@@ -162,7 +162,6 @@ void SendStatisticsProxy::SetContentType(
     VideoEncoderConfig::ContentType content_type) {
   rtc::CritScope lock(&crit_);
   if (content_type_ != content_type) {
-    uma_container_->UpdateHistograms();
     uma_container_.reset(new UmaSamplesContainer(GetUmaPrefix(content_type)));
     content_type_ = content_type;
   }