Extract common simulcast logic from VP8 wrapper and simulcast adapter

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 415 matching lines @@
 void ViEEncoder::OnBitrateUpdated(uint32_t bitrate_bps,
                                   uint8_t fraction_lost,
                                   int64_t round_trip_time_ms) {
   LOG(LS_VERBOSE) << "OnBitrateUpdated, bitrate " << bitrate_bps
                   << " packet loss " << static_cast<int>(fraction_lost)
                   << " rtt " << round_trip_time_ms;
   video_sender_.SetChannelParameters(bitrate_bps, fraction_lost,
                                      round_trip_time_ms);
   bool video_is_suspended = video_sender_.VideoSuspended();
   bool video_suspension_changed;
+
   {
     rtc::CritScope lock(&data_cs_);
     last_observed_bitrate_bps_ = bitrate_bps;
     video_suspension_changed = video_suspended_ != video_is_suspended;
     video_suspended_ = video_is_suspended;
   }
 
   if (!video_suspension_changed)
     return;
   // Video suspend-state changed, inform codec observer.
@@ skipping 11 matching lines @@
 }
 
 int32_t QMVideoSettingsCallback::SetVideoQMSettings(
     const uint32_t frame_rate,
     const uint32_t width,
     const uint32_t height) {
   return vp_->SetTargetResolution(width, height, frame_rate);
 }
 
 }  // namespace webrtc