Moved Opus-specific payload splitting into AudioDecoderOpus.

webrtc/modules/audio_coding/neteq/neteq_impl_unittest.cc

Index: webrtc/modules/audio_coding/neteq/neteq_impl_unittest.cc
diff --git a/webrtc/modules/audio_coding/neteq/neteq_impl_unittest.cc b/webrtc/modules/audio_coding/neteq/neteq_impl_unittest.cc
index 82af0e9f06923df863cc4f96194464f46815e802..4c3f215c9e87b541d21d1ddec7159d0cea25dc5d 100644
--- a/webrtc/modules/audio_coding/neteq/neteq_impl_unittest.cc
+++ b/webrtc/modules/audio_coding/neteq/neteq_impl_unittest.cc
@@ -326,11 +326,6 @@ TEST_F(NetEqImplTest, InsertPacket) {
         .WillOnce(Return(0));
   }
 
-  // Expectations for payload splitter.
-  EXPECT_CALL(*mock_payload_splitter_, SplitFec(_, _))
-      .Times(2)
-      .WillRepeatedly(Return(PayloadSplitter::kOK));
-
   // Insert first packet.
   neteq_->InsertPacket(rtp_header, payload, kFirstReceiveTime);