Fix Chromium clang plugin warnings

webrtc/modules/audio_coding/acm2/audio_coding_module.cc

 /*
  *  Copyright (c) 2012 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 1250 matching lines @@
   return receiver_.LeastRequiredDelayMs();
 }
 
 void AudioCodingModuleImpl::GetDecodingCallStatistics(
       AudioDecodingCallStats* call_stats) const {
   receiver_.GetDecodingCallStatistics(call_stats);
 }
 
 }  // namespace
 
+AudioCodingModule::Config::Config()
+    : id(0), neteq_config(), clock(Clock::GetRealTimeClock()) {
+  // Post-decode VAD is disabled by default in NetEq, however, Audio
+  // Conference Mixer relies on VAD decisions and fails without them.
+  neteq_config.enable_post_decode_vad = true;
+}
+
+AudioCodingModule::Config::Config(const Config&) = default;
+AudioCodingModule::Config::~Config() = default;
+
 // Create module
 AudioCodingModule* AudioCodingModule::Create(int id) {
   Config config;
   config.id = id;
   config.clock = Clock::GetRealTimeClock();
   config.decoder_factory = CreateBuiltinAudioDecoderFactory();
   return Create(config);
 }
 
 AudioCodingModule* AudioCodingModule::Create(int id, Clock* clock) {
@@ skipping 66 matching lines @@
 // Checks the validity of the parameters of the given codec
 bool AudioCodingModule::IsCodecValid(const CodecInst& codec) {
   bool valid = acm2::RentACodec::IsCodecValid(codec);
   if (!valid)
     WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, -1,
                  "Invalid codec setting");
   return valid;
 }
 
 }  // namespace webrtc