audio_coding: remove "main" directory

webrtc/modules/audio_coding/acm2/call_statistics.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_CALL_STATISTICS_H_
-#define WEBRTC_MODULES_AUDIO_CODING_MAIN_ACM2_CALL_STATISTICS_H_
+#ifndef WEBRTC_MODULES_AUDIO_CODING_ACM2_CALL_STATISTICS_H_
+#define WEBRTC_MODULES_AUDIO_CODING_ACM2_CALL_STATISTICS_H_
 
 #include "webrtc/common_types.h"
 #include "webrtc/modules/include/module_common_types.h"
 
 //
 // This class is for book keeping of calls to ACM. It is not useful to log API
 // calls which are supposed to be called every 10ms, e.g. PlayoutData10Ms(),
 // however, it is useful to know the number of such calls in a given time
 // interval. The current implementation covers calls to PlayoutData10Ms() with
 // detailed accounting of the decoded speech type.
@@ skipping 30 matching lines @@
   // Reset the decoding statistics.
   void ResetDecodingStatistics();
 
   AudioDecodingCallStats decoding_stat_;
 };
 
 }  // namespace acm2
 
 }  // namespace webrtc
 
-#endif  // WEBRTC_MODULES_AUDIO_CODING_MAIN_ACM2_CALL_STATISTICS_H_
+#endif  // WEBRTC_MODULES_AUDIO_CODING_ACM2_CALL_STATISTICS_H_