Fix perf regression in screenshare temporal layer bitrate allocation

webrtc/modules/video_coding/codecs/vp8/screenshare_layers.h

 /* 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.
 */
 #ifndef WEBRTC_MODULES_VIDEO_CODING_CODECS_VP8_SCREENSHARE_LAYERS_H_
 #define WEBRTC_MODULES_VIDEO_CODING_CODECS_VP8_SCREENSHARE_LAYERS_H_
@@ skipping 41 matching lines @@
   void PopulateCodecSpecific(bool base_layer_sync,
                              CodecSpecificInfoVP8* vp8_info,
                              uint32_t timestamp) override;
 
   void FrameEncoded(unsigned int size, uint32_t timestamp, int qp) override;
 
   int CurrentLayerId() const override;
 
  private:
   bool TimeToSync(int64_t timestamp) const;
+  uint32_t GetCodecTargetBitrateKbps() const;
 
   Clock* const clock_;
 
   int number_of_temporal_layers_;
   bool last_base_layer_sync_;
   uint8_t tl0_pic_idx_;
   int active_layer_;
   int64_t last_timestamp_;
   int64_t last_sync_timestamp_;
   int64_t last_emitted_tl0_timestamp_;
@@ skipping 38 matching lines @@
     int64_t num_overshoots_ = 0;
     int64_t tl0_qp_sum_ = 0;
     int64_t tl1_qp_sum_ = 0;
     int64_t tl0_target_bitrate_sum_ = 0;
     int64_t tl1_target_bitrate_sum_ = 0;
   } stats_;
 };
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_VIDEO_CODING_CODECS_VP8_SCREENSHARE_LAYERS_H_