Extract TL config to VP8 libvpx flag conversion.

webrtc/modules/video_coding/codecs/vp8/vp8_impl.h

Index: webrtc/modules/video_coding/codecs/vp8/vp8_impl.h
diff --git a/webrtc/modules/video_coding/codecs/vp8/vp8_impl.h b/webrtc/modules/video_coding/codecs/vp8/vp8_impl.h
index 858cf57b159b36f254a9a04126b286022fd99ed7..399f8823dce25f89e377aab4bfc2d2a9d8216ad4 100644
--- a/webrtc/modules/video_coding/codecs/vp8/vp8_impl.h
+++ b/webrtc/modules/video_coding/codecs/vp8/vp8_impl.h
@@ -25,8 +25,9 @@
 
 #include "webrtc/api/video/video_frame.h"
 #include "webrtc/common_video/include/i420_buffer_pool.h"
-#include "webrtc/modules/video_coding/include/video_codec_interface.h"
 #include "webrtc/modules/video_coding/codecs/vp8/include/vp8.h"
+#include "webrtc/modules/video_coding/codecs/vp8/temporal_layers.h"
+#include "webrtc/modules/video_coding/include/video_codec_interface.h"
 #include "webrtc/modules/video_coding/utility/quality_scaler.h"
 #include "webrtc/video_frame.h"
 
@@ -61,6 +62,8 @@ class VP8EncoderImpl : public VP8Encoder {
 
   const char* ImplementationName() const override;
 
+  static int EncodeFlags(TemporalReferences references);

[brandtr, 2017/05/02 09:03:44]

Change return type to vpx_enc_frame_flags_t?

[pbos-webrtc, 2017/05/02 09:23:10]

Done.

+
  private:
   void SetupTemporalLayers(int num_streams,
                            int num_temporal_layers,