Add logging to the QUIC write path.

net/quic/quic_connection_logger.h

Index: net/quic/quic_connection_logger.h
diff --git a/net/quic/quic_connection_logger.h b/net/quic/quic_connection_logger.h
index 9f38f22aab0dc7068477b75ce9578ebff41c3298..b216bbc3be799d88ccec8d188641e7296c5a8c61 100644
--- a/net/quic/quic_connection_logger.h
+++ b/net/quic/quic_connection_logger.h
@@ -20,7 +20,15 @@ class NET_EXPORT_PRIVATE QuicConnectionLogger
 
   virtual ~QuicConnectionLogger();
 
+  // QuicPacketGenerator::DebugDelegateInterface
+  virtual void OnFrameAddedToPacket(const QuicFrame& frame) OVERRIDE;
+
   // QuicConnectionDebugVisitorInterface
+  virtual void OnPacketSent(QuicPacketSequenceNumber sequence_number,
+                            EncryptionLevel level,
+                            const QuicEncryptedPacket& packet,
+                            int rv) OVERRIDE;
+
   virtual void OnPacketReceived(const IPEndPoint& self_address,
                                 const IPEndPoint& peer_address,
                                 const QuicEncryptedPacket& packet) OVERRIDE;