Fix Chromium clang plugin warnings

webrtc/modules/audio_processing/agc/agc.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 79 matching lines @@
   // TODO(turajs): just some arbitrary sanity check. We can come up with better
   // limits. The upper limit should be chosen such that the risk of clipping is
   // low. The lower limit should not result in a too quiet signal.
   if (level >= 0 || level <= -100)
     return -1;
   target_level_dbfs_ = level;
   target_level_loudness_ = Dbfs2Loudness(level);
   return 0;
 }
 
+int Agc::target_level_dbfs() const {
+  return target_level_dbfs_;
+}
+
+float Agc::voice_probability() const {
+  return vad_.last_voice_probability();
+}
+
 }  // namespace webrtc