Update audio code to use size_t more correctly,

webrtc/modules/audio_coding/codecs/audio_decoder.h

Index: webrtc/modules/audio_coding/codecs/audio_decoder.h
diff --git a/webrtc/modules/audio_coding/codecs/audio_decoder.h b/webrtc/modules/audio_coding/codecs/audio_decoder.h
index 8947e811668f76d118391a29683bf6a45005d2f9..480b1aa26db94138905a563e91ff2784aef07c69 100644
--- a/webrtc/modules/audio_coding/codecs/audio_decoder.h
+++ b/webrtc/modules/audio_coding/codecs/audio_decoder.h
@@ -62,7 +62,7 @@ class AudioDecoder {
 
   // Calls the packet-loss concealment of the decoder to update the state after
   // one or several lost packets.
-  virtual int DecodePlc(int num_frames, int16_t* decoded);
+  virtual size_t DecodePlc(size_t num_frames, int16_t* decoded);

[hlundin-webrtc, 2015/08/10 11:27:27]

I think we should still be able to return a negative value to signal an error.

[minyue-webrtc, 2015/08/10 13:02:24]

See some discussion here
https://codereview.webrtc.org/1228793004/diff/20001/webrtc/modules/audio_codi...

[hlundin-webrtc, 2015/08/10 13:12:36]

Hmm, yes, I guess I agree. It's just that I am slightly annoyed by the asymmetry
between DecodePlc and the other Decode functions. Oh, well, I'll yield.

 
   // Initializes the decoder.
   virtual int Init() = 0;