Check that stats_proxy_ is non-NULL before use.

webrtc/video/vie_encoder.cc

 /*
  *  Copyright (c) 2012 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 445 matching lines @@
   if (stats_proxy_) {
     stats_proxy_->OnEncoderReconfigured(encoder_config_,
                                         rate_allocator_->GetPreferedBitrate());
   }
   sink_->OnEncoderConfigurationChanged(
       std::move(streams), encoder_config_.min_transmit_bitrate_bps);
 }
 
 void ViEEncoder::OnFrame(const VideoFrame& video_frame) {
   RTC_DCHECK_RUNS_SERIALIZED(&incoming_frame_race_checker_);
-  stats_proxy_->OnIncomingFrame(video_frame.width(), video_frame.height());
-
+  if (stats_proxy_) {
+    stats_proxy_->OnIncomingFrame(video_frame.width(), video_frame.height());
+  }
   VideoFrame incoming_frame = video_frame;
 
   // Local time in webrtc time base.
   int64_t current_time = clock_->TimeInMilliseconds();
   incoming_frame.set_render_time_ms(current_time);
 
   // Capture time may come from clock with an offset and drift from clock_.
   int64_t capture_ntp_time_ms;
   if (video_frame.ntp_time_ms() != 0) {
     capture_ntp_time_ms = video_frame.ntp_time_ms();
@@ skipping 226 matching lines @@
     load_observer_->OnLoadUpdate(LoadObserver::kOveruse);
 }
 
 void ViEEncoder::NormalUsage() {
   RTC_DCHECK_RUN_ON(&encoder_queue_);
   if (load_observer_)
     load_observer_->OnLoadUpdate(LoadObserver::kUnderuse);
 }
 
 }  // namespace webrtc