AudioDecoderIsacT: Require caller to always specify sample rate

webrtc/voice_engine/channel.cc

Index: webrtc/voice_engine/channel.cc
diff --git a/webrtc/voice_engine/channel.cc b/webrtc/voice_engine/channel.cc
index b514dd71d0814a677ce96d489dcb819f660b8dcf..a17f546f4ed7a6f7b4b59c75e22fb1b0afa62200 100644
--- a/webrtc/voice_engine/channel.cc
+++ b/webrtc/voice_engine/channel.cc
@@ -49,8 +49,8 @@ namespace {
 bool RegisterReceiveCodec(std::unique_ptr<AudioCodingModule>* acm,
                           acm2::RentACodec* rac,
                           const CodecInst& ci) {
-  const int result =
-      (*acm)->RegisterReceiveCodec(ci, [&] { return rac->RentIsacDecoder(); });
+  const int result = (*acm)->RegisterReceiveCodec(
+      ci, [&] { return rac->RentIsacDecoder(ci.plfreq); });
   return result == 0;
 }