Moved Opus-specific payload splitting into AudioDecoderOpus.

webrtc/modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.h

Index: webrtc/modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.h
diff --git a/webrtc/modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.h b/webrtc/modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.h
index 9fd2ab7fa44579423bf4854bf585204aba638426..a46e47322ee73e28defdad5f0e4f53c274c74704 100644
--- a/webrtc/modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.h
+++ b/webrtc/modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.h
@@ -21,8 +21,7 @@ class AudioDecoderPcm16B final : public AudioDecoder {
   AudioDecoderPcm16B(int sample_rate_hz, size_t num_channels);
   void Reset() override;
   std::vector<ParseResult> ParsePayload(rtc::Buffer* payload,
-                                        uint32_t timestamp,
-                                        bool is_primary) override;
+                                        uint32_t timestamp) override;
   int PacketDuration(const uint8_t* encoded, size_t encoded_len) const override;
   int SampleRateHz() const override;
   size_t Channels() const override;