Use rtc::PacketTransportInterface in WebrtcSession unit test.

Using rtc::PacketTransportInterface instead of cricket::TransportChannel
is a preparation for refactoring channel.cc.

BUG=webrtc:6676

Review-Url: https://codereview.webrtc.org/2483093003
Cr-Commit-Position: refs/heads/master@{#14989}
diff --git a/webrtc/api/webrtcsession_unittest.cc b/webrtc/api/webrtcsession_unittest.cc
index 800ad3c..6efb996 100644
--- a/webrtc/api/webrtcsession_unittest.cc
+++ b/webrtc/api/webrtcsession_unittest.cc
@@ -40,6 +40,7 @@
 #include "webrtc/media/base/fakevideorenderer.h"
 #include "webrtc/media/base/mediachannel.h"
 #include "webrtc/media/engine/fakewebrtccall.h"
+#include "webrtc/p2p/base/packettransportinterface.h"
 #include "webrtc/p2p/base/stunserver.h"
 #include "webrtc/p2p/base/teststunserver.h"
 #include "webrtc/p2p/base/testturnserver.h"
@@ -232,39 +233,41 @@
 
   // Note that these methods are only safe to use if the signaling thread
   // is the same as the worker thread
-  cricket::TransportChannel* voice_rtp_transport_channel() {
+  rtc::PacketTransportInterface* voice_rtp_transport_channel() {
     return rtp_transport_channel(voice_channel());
   }
 
-  cricket::TransportChannel* voice_rtcp_transport_channel() {
+  rtc::PacketTransportInterface* voice_rtcp_transport_channel() {
     return rtcp_transport_channel(voice_channel());
   }
 
-  cricket::TransportChannel* video_rtp_transport_channel() {
+  rtc::PacketTransportInterface* video_rtp_transport_channel() {
     return rtp_transport_channel(video_channel());
   }
 
-  cricket::TransportChannel* video_rtcp_transport_channel() {
+  rtc::PacketTransportInterface* video_rtcp_transport_channel() {
     return rtcp_transport_channel(video_channel());
   }
 
-  cricket::TransportChannel* data_rtp_transport_channel() {
+  rtc::PacketTransportInterface* data_rtp_transport_channel() {
     return rtp_transport_channel(data_channel());
   }
 
-  cricket::TransportChannel* data_rtcp_transport_channel() {
+  rtc::PacketTransportInterface* data_rtcp_transport_channel() {
     return rtcp_transport_channel(data_channel());
   }
 
  private:
-  cricket::TransportChannel* rtp_transport_channel(cricket::BaseChannel* ch) {
+  rtc::PacketTransportInterface* rtp_transport_channel(
+      cricket::BaseChannel* ch) {
     if (!ch) {
       return nullptr;
     }
     return ch->transport_channel();
   }
 
-  cricket::TransportChannel* rtcp_transport_channel(cricket::BaseChannel* ch) {
+  rtc::PacketTransportInterface* rtcp_transport_channel(
+      cricket::BaseChannel* ch) {
     if (!ch) {
       return nullptr;
     }
@@ -2425,14 +2428,18 @@
   SessionDescriptionInterface* answer = CreateAnswer();
   SetLocalDescriptionWithoutError(answer);
 
-  cricket::TransportChannel* voice_transport_channel =
+  rtc::PacketTransportInterface* voice_transport_channel =
       session_->voice_rtp_transport_channel();
   EXPECT_TRUE(voice_transport_channel != NULL);
-  EXPECT_EQ(voice_transport_channel->transport_name(), "audio_content_name");
-  cricket::TransportChannel* video_transport_channel =
+  EXPECT_EQ(voice_transport_channel->debug_name(),
+            "audio_content_name " +
+                std::to_string(cricket::ICE_CANDIDATE_COMPONENT_RTP));
+  rtc::PacketTransportInterface* video_transport_channel =
       session_->video_rtp_transport_channel();
   ASSERT_TRUE(video_transport_channel != NULL);
-  EXPECT_EQ(video_transport_channel->transport_name(), "video_content_name");
+  EXPECT_EQ(video_transport_channel->debug_name(),
+            "video_content_name " +
+                std::to_string(cricket::ICE_CANDIDATE_COMPONENT_RTP));
   EXPECT_TRUE((video_channel_ = media_engine_->GetVideoChannel(0)) != NULL);
   EXPECT_TRUE((voice_channel_ = media_engine_->GetVoiceChannel(0)) != NULL);
 }