Split CongestionController into send- and receive-side classes.

webrtc/audio/audio_send_stream_unittest.cc

Index: webrtc/audio/audio_send_stream_unittest.cc
diff --git a/webrtc/audio/audio_send_stream_unittest.cc b/webrtc/audio/audio_send_stream_unittest.cc
index 318ea955cf79dd0906c0d17164235d9330ff6d16..b605a4fb0789036030276c71e1eb42ec9c624bf4 100644
--- a/webrtc/audio/audio_send_stream_unittest.cc
+++ b/webrtc/audio/audio_send_stream_unittest.cc
@@ -74,7 +74,6 @@ struct ConfigHelper {
         stream_config_(nullptr),
         congestion_controller_(&simulated_clock_,
                                &bitrate_observer_,
-                               nullptr,
                                &event_log_,
                                &packet_router_),
         bitrate_allocator_(&limit_observer_),
@@ -126,7 +125,7 @@ struct ConfigHelper {
   rtc::scoped_refptr<AudioState> audio_state() { return audio_state_; }
   MockVoEChannelProxy* channel_proxy() { return channel_proxy_; }
   PacketRouter* packet_router() { return &packet_router_; }
-  CongestionController* congestion_controller() {
+  SendSideCongestionController* congestion_controller() {
     return &congestion_controller_;
   }
   BitrateAllocator* bitrate_allocator() { return &bitrate_allocator_; }
@@ -249,7 +248,7 @@ struct ConfigHelper {
   MockTransmitMixer transmit_mixer_;
   AudioProcessing::AudioProcessingStatistics audio_processing_stats_;
   PacketRouter packet_router_;
-  CongestionController congestion_controller_;
+  SendSideCongestionController congestion_controller_;
   MockRtcEventLog event_log_;
   MockRtcpRttStats rtcp_rtt_stats_;
   testing::NiceMock<MockLimitObserver> limit_observer_;