Remove MediaChannel usage from webrtc_video_engine_unittest

Bug: webrtc:13931
Change-Id: Ie45a25c6b204b38b749381ef5e9403cf036b8126
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/309660
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Florent Castelli <orphis@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#40323}

media/base/fake_network_interface.h

@@ -43,7 +43,7 @@ class FakeNetworkInterface : public MediaChannelNetworkInterface {
         recvbuf_size_(-1),
         dscp_(rtc::DSCP_NO_CHANGE) {}
 
-  void SetDestination(MediaChannel* dest) { dest_ = dest; }
+  void SetDestination(MediaReceiveChannelInterface* dest) { dest_ = dest; }
 
   // Conference mode is a mode where instead of simply forwarding the packets,
   // the transport will send multiple copies of the packet with the specified
@@ -207,7 +207,7 @@ class FakeNetworkInterface : public MediaChannelNetworkInterface {
   }
 
   webrtc::TaskQueueBase* thread_;
-  MediaChannel* dest_;
+  MediaReceiveChannelInterface* dest_;
   bool conf_;
   // The ssrcs used in sending out packets in conference mode.
   std::vector<uint32_t> conf_sent_ssrcs_;

media/base/media_channel.h

@@ -948,6 +948,14 @@ class VideoMediaSendChannelInterface : public MediaSendChannelInterface {
   // Enable network condition based codec switching.
   virtual void SetVideoCodecSwitchingEnabled(bool enabled) = 0;
   virtual bool GetStats(VideoMediaSendInfo* stats) = 0;
+  // This fills the "bitrate parts" (rtx, video bitrate) of the
+  // BandwidthEstimationInfo, since that part that isn't possible to get
+  // through webrtc::Call::GetStats, as they are statistics of the send
+  // streams.
+  // TODO(holmer): We should change this so that either BWE graphs doesn't
+  // need access to bitrates of the streams, or change the (RTC)StatsCollector
+  // so that it's getting the send stream stats separately by calling
+  // GetStats(), and merges with BandwidthEstimationInfo by itself.
   virtual void FillBitrateInfo(BandwidthEstimationInfo* bwe_info) = 0;
   // Information queries to support SetReceiverFeedbackParameters
   virtual webrtc::RtcpMode SendCodecRtcpMode() const = 0;

media/base/media_channel_impl.h

@@ -271,15 +271,6 @@ class VideoMediaChannel : public MediaChannel,
                           webrtc::VideoEncoderFactory::EncoderSelectorInterface*
                               encoder_selector) override {}
 
-  // This fills the "bitrate parts" (rtx, video bitrate) of the
-  // BandwidthEstimationInfo, since that part that isn't possible to get
-  // through webrtc::Call::GetStats, as they are statistics of the send
-  // streams.
-  // TODO(holmer): We should change this so that either BWE graphs doesn't
-  // need access to bitrates of the streams, or change the (RTC)StatsCollector
-  // so that it's getting the send stream stats separately by calling
-  // GetStats(), and merges with BandwidthEstimationInfo by itself.
-  void FillBitrateInfo(BandwidthEstimationInfo* bwe_info) override = 0;
   // Gets quality stats for the channel.
   virtual bool GetSendStats(VideoMediaSendInfo* info) = 0;
   virtual bool GetReceiveStats(VideoMediaReceiveInfo* info) = 0;