Remove VideoReceiveStream deregister of decoders.

webrtc/video_engine/vie_channel.cc

Index: webrtc/video_engine/vie_channel.cc
diff --git a/webrtc/video_engine/vie_channel.cc b/webrtc/video_engine/vie_channel.cc
index 6befe1f88ee3f8bec68e35f5f230db475f727aef..681f72cc06bde2f4d5d2f487f76d2d96a0a30d4f 100644
--- a/webrtc/video_engine/vie_channel.cc
+++ b/webrtc/video_engine/vie_channel.cc
@@ -187,7 +187,8 @@ ViEChannel::~ViEChannel() {
     module_process_thread_->DeRegisterModule(rtp_rtcp);
     delete rtp_rtcp;
   }
-  StopDecodeThread();
+  if (!sender_)
+    StopDecodeThread();
   // Release modules.
   VideoCodingModule::Destroy(vcm_);
 }
@@ -439,20 +440,6 @@ int32_t ViEChannel::RegisterExternalDecoder(const uint8_t pl_type,
   return vcm_->SetRenderDelay(render_delay);
 }
 
-int32_t ViEChannel::DeRegisterExternalDecoder(const uint8_t pl_type) {
-  RTC_DCHECK(!sender_);
-  VideoCodec current_receive_codec;
-  int32_t result = 0;
-  result = vcm_->ReceiveCodec(&current_receive_codec);
-  vcm_->RegisterExternalDecoder(NULL, pl_type, false);
-
-  if (result == 0 && current_receive_codec.plType == pl_type) {
-    result = vcm_->RegisterReceiveCodec(&current_receive_codec,
-                                        number_of_cores_, false);
-  }
-  return result;
-}
-
 int32_t ViEChannel::ReceiveCodecStatistics(uint32_t* num_key_frames,
                                            uint32_t* num_delta_frames) {
   CriticalSectionScoped cs(crit_.get());