Handle padded audio packets correctly

webrtc/modules/audio_coding/neteq/delay_manager.h

Index: webrtc/modules/audio_coding/neteq/delay_manager.h
diff --git a/webrtc/modules/audio_coding/neteq/delay_manager.h b/webrtc/modules/audio_coding/neteq/delay_manager.h
index 78715720b896ab6e55e1eb60843ea74ebaa575cb..f91c1dec334ec62d6d71a24ee4c01a7d14b8de8a 100644
--- a/webrtc/modules/audio_coding/neteq/delay_manager.h
+++ b/webrtc/modules/audio_coding/neteq/delay_manager.h
@@ -95,6 +95,11 @@ class DelayManager {
   // speech.
   virtual void LastDecodedWasCngOrDtmf(bool it_was);
 
+  // Notify the delay manager that empty packets have been received. These are
+  // packets that are part of the sequence number series, so that an empty
+  // packet will shift the sequence numbers for the following packets.
+  virtual void RegisterEmptyPacket();
+
   // Accessors and mutators.
   // Assuming |delay| is in valid range.
   virtual bool SetMinimumDelay(int delay_ms);