Revert of Don't hardcode MediaType::ANY in FakeNetworkPipe.

webrtc/call/bitrate_estimator_tests.cc

Index: webrtc/call/bitrate_estimator_tests.cc
diff --git a/webrtc/call/bitrate_estimator_tests.cc b/webrtc/call/bitrate_estimator_tests.cc
index 00a3b9e833eca62ab686dbfa2e97a15f2f42f605..bb4960f658efbe2ef919032a5cfe9cc17aac7498 100644
--- a/webrtc/call/bitrate_estimator_tests.cc
+++ b/webrtc/call/bitrate_estimator_tests.cc
@@ -108,11 +108,9 @@
     receiver_call_.reset(Call::Create(config));
     sender_call_.reset(Call::Create(config));
 
-    send_transport_.reset(
-        new test::DirectTransport(sender_call_.get(), MediaType::VIDEO));
+    send_transport_.reset(new test::DirectTransport(sender_call_.get()));
     send_transport_->SetReceiver(receiver_call_->Receiver());
-    receive_transport_.reset(
-        new test::DirectTransport(receiver_call_.get(), MediaType::VIDEO));
+    receive_transport_.reset(new test::DirectTransport(receiver_call_.get()));
     receive_transport_->SetReceiver(sender_call_->Receiver());
 
     video_send_config_ = VideoSendStream::Config(send_transport_.get());