Change return type of AudioEncoder::SetMaxPlaybackRate to void

webrtc/modules/audio_coding/main/acm2/audio_coding_module_impl.cc

Index: webrtc/modules/audio_coding/main/acm2/audio_coding_module_impl.cc
diff --git a/webrtc/modules/audio_coding/main/acm2/audio_coding_module_impl.cc b/webrtc/modules/audio_coding/main/acm2/audio_coding_module_impl.cc
index eec00dec3ef67fe7ea162b3678bd7b41b872209b..2a81e469d096109d02b50e65309a39f3ddc44c82 100644
--- a/webrtc/modules/audio_coding/main/acm2/audio_coding_module_impl.cc
+++ b/webrtc/modules/audio_coding/main/acm2/audio_coding_module_impl.cc
@@ -787,8 +787,8 @@ int AudioCodingModuleImpl::SetOpusMaxPlaybackRate(int frequency_hz) {
   }
   if (!codec_manager_.CurrentEncoderIsOpus())
     return -1;
-  return codec_manager_.CurrentEncoder()->SetMaxPlaybackRate(frequency_hz) ? 0
-                                                                           : -1;
+  codec_manager_.CurrentEncoder()->SetMaxPlaybackRate(frequency_hz);
+  return 0;
 }
 
 int AudioCodingModuleImpl::EnableOpusDtx() {