Reland of Add task queue to Call.

webrtc/test/call_test.cc

Index: webrtc/test/call_test.cc
diff --git a/webrtc/test/call_test.cc b/webrtc/test/call_test.cc
index 590479f4d4dc700bc3b65f44c5b67f42350e1791..a766f79f5629fafddf241561bc7bce8e7459516f 100644
--- a/webrtc/test/call_test.cc
+++ b/webrtc/test/call_test.cc
@@ -267,7 +267,7 @@ void CallTest::CreateVideoStreams() {
   RTC_DCHECK(audio_receive_streams_.empty());
 
   video_send_stream_ = sender_call_->CreateVideoSendStream(
-      video_send_config_, video_encoder_config_);
+      video_send_config_.Copy(), video_encoder_config_.Copy());
   for (size_t i = 0; i < video_receive_configs_.size(); ++i) {
     video_receive_streams_.push_back(receiver_call_->CreateVideoReceiveStream(
         video_receive_configs_[i].Copy()));