message: Overwrite dti for vp8 screenshare forced key frame
  Cr-Commit-Position: refs/heads/master@{#30809}
diff: @@ -333,8 +333,6 @@ void ScreenshareLayers::OnEncodeDone(size_t stream_index,
  dependency_info->decode_target_indications;
  } else {
  RTC_DCHECK(is_keyframe);
  - generic_frame_info.decode_target_indications =
  - GenericFrameInfo::DecodeTargetInfo("SS");
  }
  if (is_keyframe) {
  @@ -346,6 +344,8 @@ void ScreenshareLayers::OnEncodeDone(size_t stream_index,
  active_layer_ = 1;
  info->template_structure =
  GetTemplateStructure(number_of_temporal_layers_);
  + generic_frame_info.decode_target_indications =
  + GenericFrameInfo::DecodeTargetInfo("SS");
  } else if (active_layer_ >= 0 && layers_[active_layer_].state ==
  TemporalLayer::State::kKeyFrame) {
  layers_[active_layer_].state = TemporalLayer::State::kNormal;
  