NetEq: Ask AudioDecoder for sample rate instead of passing it as an argument

webrtc/modules/audio_coding/neteq/tools/neteq_external_decoder_test.cc

 /*
  *  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 16 matching lines @@
       channels_(decoder_->Channels()) {
   NetEq::Config config;
   config.sample_rate_hz = sample_rate_hz_;
   neteq_.reset(NetEq::Create(config, CreateBuiltinAudioDecoderFactory()));
   printf("%" PRIuS "\n", channels_);
 }
 
 void NetEqExternalDecoderTest::Init() {
   ASSERT_EQ(NetEq::kOK,
             neteq_->RegisterExternalDecoder(decoder_, codec_, name_,
-                                            kPayloadType, sample_rate_hz_));
+                                            kPayloadType));
 }
 
 void NetEqExternalDecoderTest::InsertPacket(
     WebRtcRTPHeader rtp_header,
     rtc::ArrayView<const uint8_t> payload,
     uint32_t receive_timestamp) {
   ASSERT_EQ(NetEq::kOK,
             neteq_->InsertPacket(rtp_header, payload, receive_timestamp));
 }
 
 void NetEqExternalDecoderTest::GetOutputAudio(AudioFrame* output) {
   // Get audio from regular instance.
   bool muted;
   EXPECT_EQ(NetEq::kOK, neteq_->GetAudio(output, &muted));
   ASSERT_FALSE(muted);
   EXPECT_EQ(channels_, output->num_channels_);
   EXPECT_EQ(static_cast<size_t>(kOutputLengthMs * sample_rate_hz_ / 1000),
             output->samples_per_channel_);
   EXPECT_EQ(sample_rate_hz_, neteq_->last_output_sample_rate_hz());
 }
 
 }  // namespace test
 }  // namespace webrtc