Renaming probing_interval to bwe_period globally.

webrtc/api/audio_codecs/audio_encoder.h

Index: webrtc/api/audio_codecs/audio_encoder.h
diff --git a/webrtc/api/audio_codecs/audio_encoder.h b/webrtc/api/audio_codecs/audio_encoder.h
index 3e810005fd99c8b6e8b8aac6a91df6baf5966694..06e232d0cef1b568b609a282ae095858285199bc 100644
--- a/webrtc/api/audio_codecs/audio_encoder.h
+++ b/webrtc/api/audio_codecs/audio_encoder.h
@@ -189,7 +189,7 @@ class AudioEncoder {
   // the bandwidth estimator to this encoder to allow it to adapt.
   virtual void OnReceivedUplinkBandwidth(
       int target_audio_bitrate_bps,
-      rtc::Optional<int64_t> probing_interval_ms);
+      rtc::Optional<int64_t> bwe_period_ms);
 
   // Provides RTT to this encoder to allow it to adapt.
   virtual void OnReceivedRtt(int rtt_ms);