Initialize VideoEncoder objects asynchronously.

webrtc/video_send_stream.h

Index: webrtc/video_send_stream.h
diff --git a/webrtc/video_send_stream.h b/webrtc/video_send_stream.h
index 83a96d3fed02d496358ad0a9df8bcfa22d2b4242..27f242b9a3a73774d29f2623ffa82ee33307eca6 100644
--- a/webrtc/video_send_stream.h
+++ b/webrtc/video_send_stream.h
@@ -178,7 +178,7 @@ class VideoSendStream : public SendStream {
   // Set which streams to send. Must have at least as many SSRCs as configured
   // in the config. Encoder settings are passed on to the encoder instance along
   // with the VideoStream settings.
-  virtual bool ReconfigureVideoEncoder(const VideoEncoderConfig& config) = 0;
+  virtual void ReconfigureVideoEncoder(const VideoEncoderConfig& config) = 0;
 
   virtual Stats GetStats() = 0;
 };