AudioDecoder: New method SampleRateHz, + implementations for our codecs

webrtc/modules/audio_coding/codecs/audio_decoder.cc

Index: webrtc/modules/audio_coding/codecs/audio_decoder.cc
diff --git a/webrtc/modules/audio_coding/codecs/audio_decoder.cc b/webrtc/modules/audio_coding/codecs/audio_decoder.cc
index 442ddc1e4b86b081653da168b363bf26e6bc9683..e91161e33c826655b9afca2ff1ddddb9a7ff0157 100644
--- a/webrtc/modules/audio_coding/codecs/audio_decoder.cc
+++ b/webrtc/modules/audio_coding/codecs/audio_decoder.cc
@@ -82,6 +82,10 @@ bool AudioDecoder::PacketHasFec(const uint8_t* encoded,
   return false;
 }
 
+int AudioDecoder::SampleRateHz() const {

[hlundin-webrtc, 2016/05/30 14:10:17]

Add a TODO to actually remove this implementation.

[kwiberg-webrtc, 2016/05/31 08:26:05]

Done.

+  return -1;
+}
+
 AudioDecoder::SpeechType AudioDecoder::ConvertSpeechType(int16_t type) {
   switch (type) {
     case 0:  // TODO(hlundin): Both iSAC and Opus return 0 for speech.