Derive current layer from TL frame config.

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

Index: webrtc/modules/video_coding/codecs/vp8/screenshare_layers.h
diff --git a/webrtc/modules/video_coding/codecs/vp8/screenshare_layers.h b/webrtc/modules/video_coding/codecs/vp8/screenshare_layers.h
index 27f641acad919533804abd874d8f8d0ce6ae0663..5269291932a8fac2f53dd48aa5cb39f3356b342c 100644
--- a/webrtc/modules/video_coding/codecs/vp8/screenshare_layers.h
+++ b/webrtc/modules/video_coding/codecs/vp8/screenshare_layers.h
@@ -35,7 +35,7 @@ class ScreenshareLayers : public TemporalLayers {
 
   // Returns the recommended VP8 encode flags needed. May refresh the decoder
   // and/or update the reference buffers.
-  TemporalReferences UpdateLayerConfig(uint32_t timestamp) override;
+  TemporalLayers::FrameConfig UpdateLayerConfig(uint32_t timestamp) override;
 
   // Update state based on new bitrate target and incoming framerate.
   // Returns the bitrate allocation for the active temporal layers.
@@ -48,12 +48,13 @@ class ScreenshareLayers : public TemporalLayers {
   bool UpdateConfiguration(vpx_codec_enc_cfg_t* cfg) override;
 
   void PopulateCodecSpecific(bool base_layer_sync,
+                             TemporalLayers::FrameConfig tl_config,
                              CodecSpecificInfoVP8* vp8_info,
                              uint32_t timestamp) override;
 
   void FrameEncoded(unsigned int size, int qp) override;
 
-  int CurrentLayerId() const override;
+  int GetTemporalLayerId(TemporalLayers::FrameConfig tl_config) const override;
 
  private:
   bool TimeToSync(int64_t timestamp) const;