Drop frames until specified bitrate is achieved.

webrtc/video/video_quality_test.h

 /*
  *  Copyright (c) 2015 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.
  */
 #ifndef WEBRTC_VIDEO_VIDEO_QUALITY_TEST_H_
@@ skipping 113 matching lines @@
   // We need a more general capturer than the FrameGeneratorCapturer.
   std::unique_ptr<test::VideoCapturer> video_capturer_;
   std::unique_ptr<test::TraceToStderr> trace_to_stderr_;
   std::unique_ptr<test::FrameGenerator> frame_generator_;
   std::unique_ptr<VideoEncoder> video_encoder_;
   Clock* const clock_;
 
   int receive_logs_;
   int send_logs_;
 
+  VideoSendStream::DegradationPreference degradation_preference_ =
+      VideoSendStream::DegradationPreference::kBalanced;
   Params params_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_VIDEO_VIDEO_QUALITY_TEST_H_