Moved Opus-specific payload splitting into AudioDecoderOpus.

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 b752e2ad1a97563c9206ee781c2170d8651dd50c..29d5886712d071028d8c8493c389982ebf609efd 100644
--- a/webrtc/modules/audio_coding/codecs/audio_decoder.cc
+++ b/webrtc/modules/audio_coding/codecs/audio_decoder.cc
@@ -25,9 +25,9 @@ namespace webrtc {
 AudioDecoder::ParseResult::ParseResult() = default;
 AudioDecoder::ParseResult::ParseResult(ParseResult&& b) = default;
 AudioDecoder::ParseResult::ParseResult(uint32_t timestamp,
-                                       bool primary,
+                                       uint8_t priority,
                                        std::unique_ptr<EncodedAudioFrame> frame)
-    : timestamp(timestamp), primary(primary), frame(std::move(frame)) {}
+    : timestamp(timestamp), priority(priority), frame(std::move(frame)) {}
 
 AudioDecoder::ParseResult::~ParseResult() = default;
 
@@ -36,12 +36,11 @@ AudioDecoder::ParseResult& AudioDecoder::ParseResult::operator=(
 
 std::vector<AudioDecoder::ParseResult> AudioDecoder::ParsePayload(
     rtc::Buffer* payload,
-    uint32_t timestamp,
-    bool is_primary) {
+    uint32_t timestamp) {
   std::vector<ParseResult> results;
   std::unique_ptr<EncodedAudioFrame> frame(
-      new LegacyEncodedAudioFrame(this, payload, is_primary));
-  results.emplace_back(timestamp, is_primary, std::move(frame));
+      new LegacyEncodedAudioFrame(this, payload));
+  results.emplace_back(timestamp, 0, std::move(frame));
   return results;
 }