Move encoder thread to VideoSendStream.

webrtc/video/video_send_stream.h

Index: webrtc/video/video_send_stream.h
diff --git a/webrtc/video/video_send_stream.h b/webrtc/video/video_send_stream.h
index b9d6ea008ac0287b595cb84eae107a31422f5205..88d8abc4fb647d7c49940bbc48e627b1ef6a6592 100644
--- a/webrtc/video/video_send_stream.h
+++ b/webrtc/video/video_send_stream.h
@@ -75,6 +75,9 @@ class VideoSendStream : public webrtc::VideoSendStream,
   int GetPaddingNeededBps() const;
 
  private:
+  static bool EncoderThreadFunction(void* obj);
+  void EncoderProcess();
+
   void ConfigureSsrcs();
 
   SendStatisticsProxy stats_proxy_;
@@ -87,6 +90,10 @@ class VideoSendStream : public webrtc::VideoSendStream,
   CongestionController* const congestion_controller_;
   VieRemb* const remb_;
 
+  rtc::PlatformThread encoder_thread_;
+  rtc::Event encoder_wakeup_event_;
+  volatile int stop_encoder_thread_;
+
   OveruseFrameDetector overuse_detector_;
   PayloadRouter payload_router_;
   EncoderStateFeedback encoder_feedback_;