Misc. small cleanups

webrtc/modules/audio_coding/codecs/g711/audio_encoder_pcm.h

Index: webrtc/modules/audio_coding/codecs/g711/audio_encoder_pcm.h
diff --git a/webrtc/modules/audio_coding/codecs/g711/audio_encoder_pcm.h b/webrtc/modules/audio_coding/codecs/g711/audio_encoder_pcm.h
index fd996dca755a9815545bd6f002b6591ec49fcf92..6891cbdc3af6c440734d079d1fb6147cb5990347 100644
--- a/webrtc/modules/audio_coding/codecs/g711/audio_encoder_pcm.h
+++ b/webrtc/modules/audio_coding/codecs/g711/audio_encoder_pcm.h
@@ -54,7 +54,7 @@ class AudioEncoderPcm : public AudioEncoder {
                             size_t input_len,
                             uint8_t* encoded) = 0;
 
-  virtual int BytesPerSample() const = 0;
+  virtual size_t BytesPerSample() const = 0;
 
  private:
   const int sample_rate_hz_;
@@ -83,7 +83,7 @@ class AudioEncoderPcmA final : public AudioEncoderPcm {
                     size_t input_len,
                     uint8_t* encoded) override;
 
-  int BytesPerSample() const override;
+  size_t BytesPerSample() const override;
 
  private:
   static const int kSampleRateHz = 8000;
@@ -105,7 +105,7 @@ class AudioEncoderPcmU final : public AudioEncoderPcm {
                     size_t input_len,
                     uint8_t* encoded) override;
 
-  int BytesPerSample() const override;
+  size_t BytesPerSample() const override;
 
  private:
   static const int kSampleRateHz = 8000;