audio_coding: remove "main" directory

webrtc/modules/audio_coding/acm2/initial_delay_manager.cc

 /*
  *  Copyright (c) 2013 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/initial_delay_manager.h"
+#include "webrtc/modules/audio_coding/acm2/initial_delay_manager.h"
 
 namespace webrtc {
 
 namespace acm2 {
 
 InitialDelayManager::InitialDelayManager(int initial_delay_ms,
                                          int late_packet_threshold)
     : last_packet_type_(kUndefinedPacket),
       last_receive_timestamp_(0),
       timestamp_step_(0),
@@ skipping 211 matching lines @@
 
 void InitialDelayManager::UpdatePlayoutTimestamp(
     const RTPHeader& current_header, int sample_rate_hz) {
   playout_timestamp_ = current_header.timestamp - static_cast<uint32_t>(
       initial_delay_ms_ * sample_rate_hz / 1000);
 }
 
 }  // namespace acm2
 
 }  // namespace webrtc