Gather histogram for received packets indicating losses.

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 ed9577ac361761ec0b98805f6e5f7eead0de5da7..7f8eebe924c489e74a9cf80a1275d92e9edda5c5 100644
--- a/net/quic/quic_connection_logger.h
+++ b/net/quic/quic_connection_logger.h
@@ -5,6 +5,8 @@
 #ifndef NET_QUIC_QUIC_CONNECTION_LOGGER_H_
 #define NET_QUIC_QUIC_CONNECTION_LOGGER_H_
 
+#include <vector>
+
 #include "net/base/ip_endpoint.h"
 #include "net/quic/quic_connection.h"
 #include "net/quic/quic_protocol.h"
@@ -78,6 +80,8 @@ class NET_EXPORT_PRIVATE QuicConnectionLogger
   size_t num_truncated_acks_received_;
   // The kCADR value provided by the server in ServerHello.
   IPEndPoint client_address_;
+  // Vector of inital packets status', where false means never received.
+  std::vector<bool> packets_received_;

[Ryan Hamilton, 2014/03/05 03:48:00]

You could also consider using a std::bitset, if you'd like, since it's optimized
to hold single bits.

[jar (doing other things), 2014/03/06 03:34:17]

Done.

   DISALLOW_COPY_AND_ASSIGN(QuicConnectionLogger);
 };