Fix style guide issues in audio mixer.

webrtc/modules/audio_mixer/audio_mixer_impl.h

 /*
  *  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 67 matching lines @@
  private:
   // Set/get mix frequency
   int32_t SetOutputFrequency(const Frequency& frequency);
   Frequency OutputFrequency() const;
 
   // Compute what audio sources to mix from audio_source_list_. Ramp
   // in and out. Update mixed status. Mixes up to
   // kMaximumAmountOfMixedAudioSources audio sources.
   AudioFrameList GetNonAnonymousAudio() const EXCLUSIVE_LOCKS_REQUIRED(crit_);
 
-  // Return the lowest mixing frequency that can be used without having to
-  // downsample any audio.
-  int32_t GetLowestMixingFrequency() const;
-  int32_t GetLowestMixingFrequencyFromList(
-      const MixerAudioSourceList& mixList) const;
-

[aleloi, 2016/08/31 12:35:05]

These two have not been used for the last 5-6 mixer changes.

   // Return the AudioFrames that should be mixed anonymously. Ramp in
   // and out. Update mixed status.
   AudioFrameList GetAnonymousAudio() const EXCLUSIVE_LOCKS_REQUIRED(crit_);
 
   // This function returns true if it finds the MixerAudioSource in the
   // specified list of MixerAudioSources.
   bool IsAudioSourceInList(const MixerAudioSource& audio_source,
-                           const MixerAudioSourceList& audioSourceList) const;
+                           const MixerAudioSourceList& audio_source_list) const;
 
   // Add/remove the MixerAudioSource to the specified
   // MixerAudioSource list.
   bool AddAudioSourceToList(MixerAudioSource* audio_source,
-                            MixerAudioSourceList* audioSourceList) const;
-  bool RemoveAudioSourceFromList(MixerAudioSource* removeAudioSource,
-                                 MixerAudioSourceList* audioSourceList) const;
+                            MixerAudioSourceList* audio_source_list) const;
+  bool RemoveAudioSourceFromList(MixerAudioSource* remove_audio_source,
+                                 MixerAudioSourceList* audio_source_list) const;
 
-  // Mix the AudioFrames stored in audioFrameList into mixedAudio.
-  static int32_t MixFromList(AudioFrame* mixedAudio,
-                             const AudioFrameList& audioFrameList,
+  // Mix the AudioFrames stored in audioFrameList into mixed_audio.
+  static int32_t MixFromList(AudioFrame* mixed_audio,
+                             const AudioFrameList& audio_frame_list,
                              int32_t id,
                              bool use_limiter);
 
-  bool LimitMixedAudio(AudioFrame* mixedAudio) const;
+  bool LimitMixedAudio(AudioFrame* mixed_audio) const;
 
   // Output level functions for VoEVolumeControl.
   int GetOutputAudioLevel() override;
 
   int GetOutputAudioLevelFullRange() override;
 
   std::unique_ptr<CriticalSectionWrapper> crit_;
 
   int32_t id_;
 
   // The current sample frequency and sample size when mixing.
   Frequency output_frequency_;
   size_t sample_size_;
 
   // List of all audio sources. Note all lists are disjunct
   MixerAudioSourceList audio_source_list_;  // May be mixed.
 
-  // Always mixed, anonomously.
+  // Always mixed, anonymously.
   MixerAudioSourceList additional_audio_source_list_;
 
   size_t num_mixed_audio_sources_;
   // Determines if we will use a limiter for clipping protection during
   // mixing.
   bool use_limiter_;
 
   uint32_t time_stamp_;
 
   // Ensures that Mix is called from the same thread.
   rtc::ThreadChecker thread_checker_;
 
   // Used for inhibiting saturation in mixing.
   std::unique_ptr<AudioProcessing> limiter_;
 
   // Measures audio level for the combined signal.
   voe::AudioLevel audio_level_;
+
+  RTC_DISALLOW_COPY_AND_ASSIGN(AudioMixerImpl);
 };
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_MIXER_AUDIO_MIXER_IMPL_H_