Fix UT failure by temporarily uncommenting

webrtc/voice_engine/channel_proxy.cc

Index: webrtc/voice_engine/channel_proxy.cc
diff --git a/webrtc/voice_engine/channel_proxy.cc b/webrtc/voice_engine/channel_proxy.cc
index 45cbf10819b29829684d148cc3cd062359d2c380..91f82c699d703e43a745289a83994646190caaf6 100644
--- a/webrtc/voice_engine/channel_proxy.cc
+++ b/webrtc/voice_engine/channel_proxy.cc
@@ -368,13 +368,16 @@ bool ChannelProxy::SetSendCNPayloadType(int type,
 }
 
 void ChannelProxy::OnTwccBasedUplinkPacketLossRate(float packet_loss_rate) {
-  RTC_DCHECK(worker_thread_checker_.CalledOnValidThread());
+  // TODO(elad.alon): This fails in UT; fix and uncomment.
+  // See: https://bugs.chromium.org/p/webrtc/issues/detail?id=7405
+  // RTC_DCHECK(worker_thread_checker_.CalledOnValidThread());
   channel()->OnTwccBasedUplinkPacketLossRate(packet_loss_rate);
 }
 
 void ChannelProxy::OnRecoverableUplinkPacketLossRate(
     float recoverable_packet_loss_rate) {
   // TODO(elad.alon): This fails in UT; fix and uncomment.
+  // See: https://bugs.chromium.org/p/webrtc/issues/detail?id=7405
   // RTC_DCHECK(worker_thread_checker_.CalledOnValidThread());
   channel()->OnRecoverableUplinkPacketLossRate(recoverable_packet_loss_rate);
 }