Implement AudioSendStream::GetStats().

webrtc/audio/audio_receive_stream.h

Index: webrtc/audio/audio_receive_stream.h
diff --git a/webrtc/audio/audio_receive_stream.h b/webrtc/audio/audio_receive_stream.h
index 5c77653a75425eb6e5f7560088b0e2b6eedb100a..5d02b0e2aecb9ac04fae18610d83c15a266a5f67 100644
--- a/webrtc/audio/audio_receive_stream.h
+++ b/webrtc/audio/audio_receive_stream.h
@@ -24,7 +24,7 @@ class VoiceEngine;
 
 namespace internal {
 
-class AudioReceiveStream : public webrtc::AudioReceiveStream {
+class AudioReceiveStream final : public webrtc::AudioReceiveStream {
  public:
   AudioReceiveStream(RemoteBitrateEstimator* remote_bitrate_estimator,
                      const webrtc::AudioReceiveStream::Config& config,
@@ -53,6 +53,8 @@ class AudioReceiveStream : public webrtc::AudioReceiveStream {
   // We hold one interface pointer to the VoE to make sure it is kept alive.
   ScopedVoEInterface<VoEBase> voe_base_;
   rtc::scoped_ptr<RtpHeaderParser> rtp_header_parser_;
+
+  RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(AudioReceiveStream);
 };
 }  // namespace internal
 }  // namespace webrtc