Don't hardcode MediaType::ANY in FakeNetworkPipe.

webrtc/video/video_send_stream_tests.cc

Index: webrtc/video/video_send_stream_tests.cc
diff --git a/webrtc/video/video_send_stream_tests.cc b/webrtc/video/video_send_stream_tests.cc
index 2cd542a3020aa0d15f2868fcbe7e34bbaa68fb31..7ef4d585cee746b0b2d1dc86c969bac2616e50d5 100644
--- a/webrtc/video/video_send_stream_tests.cc
+++ b/webrtc/video/video_send_stream_tests.cc
@@ -439,7 +439,8 @@ class UlpfecObserver : public test::EndToEndTest {
     config.loss_percent = 5;
     config.queue_delay_ms = kNetworkDelayMs;
     return new test::PacketTransport(sender_call, this,
-                                     test::PacketTransport::kSender, config);
+                                     test::PacketTransport::kSender,
+                                     MediaType::VIDEO, config);
   }
 
   void ModifyVideoConfigs(
@@ -594,7 +595,8 @@ class FlexfecObserver : public test::EndToEndTest {
     config.loss_percent = 5;
     config.queue_delay_ms = kNetworkDelayMs;
     return new test::PacketTransport(sender_call, this,
-                                     test::PacketTransport::kSender, config);
+                                     test::PacketTransport::kSender,
+                                     MediaType::VIDEO, config);
   }
 
   void ModifyVideoConfigs(
@@ -1263,7 +1265,8 @@ TEST_F(VideoSendStreamTest, PaddingIsPrimarilyRetransmissions) {
       config.link_capacity_kbps = kCapacityKbps;
       config.queue_delay_ms = kNetworkDelayMs;
       return new test::PacketTransport(sender_call, this,
-                                       test::PacketTransport::kSender, config);
+                                       test::PacketTransport::kSender,
+                                       MediaType::VIDEO, config);
     }
 
     void ModifyVideoConfigs(