Make an enum class out of NetEqDecoder, and hide the neteq_decoders_ table

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

 /*
  *  Copyright (c) 2014 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 14 matching lines @@
 
 namespace webrtc {
 namespace test {
 
 int64_t NetEqPerformanceTest::Run(int runtime_ms,
                                   int lossrate,
                                   double drift_factor) {
   const std::string kInputFileName =
       webrtc::test::ResourcePath("audio_coding/testfile32kHz", "pcm");
   const int kSampRateHz = 32000;
-  const webrtc::NetEqDecoder kDecoderType = webrtc::kDecoderPCM16Bswb32kHz;
+  const webrtc::NetEqDecoder kDecoderType =
+      webrtc::NetEqDecoder::kDecoderPCM16Bswb32kHz;
   const int kPayloadType = 95;
 
   // Initialize NetEq instance.
   NetEq::Config config;
   config.sample_rate_hz = kSampRateHz;
   NetEq* neteq = NetEq::Create(config);
   // Register decoder in |neteq|.
   if (neteq->RegisterPayloadType(kDecoderType, kPayloadType) != 0)
     return -1;
 
@@ skipping 76 matching lines @@
       drift_flipped = true;
     }
   }
   int64_t end_time_ms = clock->TimeInMilliseconds();
   delete neteq;
   return end_time_ms - start_time_ms;
 }
 
 }  // namespace test
 }  // namespace webrtc