Adapt encoder behavior to target bitrate

remoting/codec/video_encoder_vpx.h

Index: remoting/codec/video_encoder_vpx.h
diff --git a/remoting/codec/video_encoder_vpx.h b/remoting/codec/video_encoder_vpx.h
index a6701093b2cba402396c217b20cb9317614e9c16..6d76af45afa596576de238e7aed117e6fb936585 100644
--- a/remoting/codec/video_encoder_vpx.h
+++ b/remoting/codec/video_encoder_vpx.h
@@ -14,6 +14,7 @@
 #include "remoting/codec/scoped_vpx_codec.h"
 #include "remoting/codec/video_encoder.h"
 #include "remoting/codec/video_encoder_helper.h"
+#include "third_party/libvpx/source/libvpx/vpx/vpx_encoder.h"
 
 typedef struct vpx_image vpx_image_t;
 
@@ -39,6 +40,7 @@ class VideoEncoderVpx : public VideoEncoder {
   void SetLosslessColor(bool want_lossless) override;
   std::unique_ptr<VideoPacket> Encode(const webrtc::DesktopFrame& frame,
                                       uint32_t flags) override;
+  void UpdateTargetBitrate(uint32_t bitrate) override;
 
  private:
   explicit VideoEncoderVpx(bool use_vp9);
@@ -71,6 +73,9 @@ class VideoEncoderVpx : public VideoEncoder {
   // Holds the initialized & configured codec.
   ScopedVpxCodec codec_;
 
+  vpx_codec_enc_cfg_t config_;
+  uint32_t target_bitrate_kbps_;
+
   // Used to generate zero-based frame timestamps.
   base::TimeTicks timestamp_base_;