audio_coding: remove "main" directory

webrtc/modules/audio_coding/acm2/codec_manager.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.
  */
 
-#include "webrtc/modules/audio_coding/main/acm2/codec_manager.h"
+#include "webrtc/modules/audio_coding/acm2/codec_manager.h"
 
 #include "webrtc/base/checks.h"
 #include "webrtc/engine_configurations.h"
-#include "webrtc/modules/audio_coding/main/acm2/rent_a_codec.h"
+#include "webrtc/modules/audio_coding/acm2/rent_a_codec.h"
 #include "webrtc/system_wrappers/include/trace.h"
 
 namespace webrtc {
 namespace acm2 {
 
 namespace {
 
 // Check if the given codec is a valid to be registered as send codec.
 int IsValidSendCodec(const CodecInst& send_codec) {
   int dummy_id = 0;
@@ skipping 278 matching lines @@
       CurrentEncoder()->SetFec(enable_codec_fec) && enable_codec_fec;
   return codec_stack_params_.use_codec_fec == enable_codec_fec ? 0 : -1;
 }
 
 AudioDecoder* CodecManager::GetAudioDecoder(const CodecInst& codec) {
   return IsIsac(codec) ? rent_a_codec_.RentIsacDecoder() : nullptr;
 }
 
 }  // namespace acm2
 }  // namespace webrtc