audio_coding: remove "main" directory

webrtc/modules/audio_coding/acm2/initial_delay_manager.h

 /*
  *  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.
  */
 
-#ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_ACM2_INITIAL_DELAY_MANAGER_H_
-#define WEBRTC_MODULES_AUDIO_CODING_MAIN_ACM2_INITIAL_DELAY_MANAGER_H_
+#ifndef WEBRTC_MODULES_AUDIO_CODING_ACM2_INITIAL_DELAY_MANAGER_H_
+#define WEBRTC_MODULES_AUDIO_CODING_ACM2_INITIAL_DELAY_MANAGER_H_
 
 #include "webrtc/base/scoped_ptr.h"
 #include "webrtc/modules/include/module_common_types.h"
 
 namespace webrtc {
 
 namespace acm2 {
 
 class InitialDelayManager {
  public:
@@ skipping 87 matching lines @@
   // If the number of late packets exceed this value (computed based on current
   // timestamp and last received timestamp), sequence of sync-packets is
   // specified.
   const int late_packet_threshold_;
 };
 
 }  // namespace acm2
 
 }  // namespace webrtc
 
-#endif  // WEBRTC_MODULES_AUDIO_CODING_MAIN_ACM2_INITIAL_DELAY_MANAGER_H_
+#endif  // WEBRTC_MODULES_AUDIO_CODING_ACM2_INITIAL_DELAY_MANAGER_H_