We no longer use compilers that can't =default move construction and assignment

webrtc/modules/audio_coding/codecs/cng/audio_encoder_cng.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 19 matching lines @@
   std::unique_ptr<CNG_enc_inst, CngInstDeleter> cng_inst(ci);
   RTC_CHECK_EQ(0,
                WebRtcCng_InitEnc(cng_inst.get(), sample_rate_hz,
                                  sid_frame_interval_ms, num_cng_coefficients));
   return cng_inst;
 }
 
 }  // namespace
 
 AudioEncoderCng::Config::Config() = default;
-
-// TODO(kwiberg): =default this when Visual Studio learns to handle it.
-AudioEncoderCng::Config::Config(Config&& c)
-    : num_channels(c.num_channels),
-      payload_type(c.payload_type),
-      speech_encoder(std::move(c.speech_encoder)),
-      vad_mode(c.vad_mode),
-      sid_frame_interval_ms(c.sid_frame_interval_ms),
-      num_cng_coefficients(c.num_cng_coefficients),
-      vad(c.vad) {}
-
+AudioEncoderCng::Config::Config(Config&&) = default;
 AudioEncoderCng::Config::~Config() = default;
 
 bool AudioEncoderCng::Config::IsOk() const {
   if (num_channels != 1)
     return false;
   if (!speech_encoder)
     return false;
   if (num_channels != speech_encoder->NumChannels())
     return false;
   if (sid_frame_interval_ms <
@@ skipping 214 matching lines @@
     }
   }
   return info;
 }
 
 size_t AudioEncoderCng::SamplesPer10msFrame() const {
   return rtc::CheckedDivExact(10 * SampleRateHz(), 1000);
 }
 
 }  // namespace webrtc