Include buffer size limits in NetEq config struct

This change includes max_packets_in_buffer and max_delay_ms in the
NetEq config struct. The packet buffer is also no longer limited in
terms of payload sizes (bytes), only number of packets.

The old constants governing the packet buffer limits are deleted.

BUG=3083
R=turaj@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/14389004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5989 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/modules/audio_coding/neteq4/neteq_impl.h

@@ -186,9 +186,7 @@ class NetEqImpl : public webrtc::NetEq {
   virtual void FlushBuffers();
 
   virtual void PacketBufferStatistics(int* current_num_packets,
-                                      int* max_num_packets,
-                                      int* current_memory_size_bytes,
-                                      int* max_memory_size_bytes) const;
+                                      int* max_num_packets) const;
 
   // Get sequence number and timestamp of the latest RTP.
   // This method is to facilitate NACK.