Fix for stats updated twice when switching content type.

webrtc/video/send_statistics_proxy.cc

 /*
  *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 144 matching lines @@
   if (max_delay_ms != -1) {
     RTC_HISTOGRAM_COUNTS_SPARSE_100000(uma_prefix_ + "SendSideDelayMaxInMs",
                                        max_delay_ms);
   }
 }
 
 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;
   }
 }
 
 void SendStatisticsProxy::OnEncoderImplementationName(
     const char* implementation_name) {
   rtc::CritScope lock(&crit_);
   stats_.encoder_implementation_name = implementation_name;
 }
@@ skipping 251 matching lines @@
   return Fraction(min_required_samples, 1000.0f);
 }
 
 int SendStatisticsProxy::BoolSampleCounter::Fraction(
     int min_required_samples, float multiplier) const {
   if (num_samples < min_required_samples || num_samples == 0)
     return -1;
   return static_cast<int>((sum * multiplier / num_samples) + 0.5f);
 }
 }  // namespace webrtc