QUIC - add UMA histograms to track how often either connection or

streams are blocked when a PING frame is sent.

The above should give us some better insight into whether flow control
fixes have fixed all the flow control cases, and/or if we break
something in the future.

R=rch@chromium.org,asvitkine@chromium.org

Review URL: https://codereview.chromium.org/655683003

Cr-Commit-Position: refs/heads/master@{#299529}

1 files changed, 3 insertions, 1 deletions

diff --git a/net/quic/quic_connection_logger.h b/net/quic/quic_connection_logger.h
index 2d32b46..c714e3b 100644
--- a/net/quic/quic_connection_logger.h
+++ b/net/quic/quic_connection_logger.h
@@ -12,6 +12,7 @@
 #include "net/base/network_change_notifier.h"
 #include "net/quic/quic_connection.h"
 #include "net/quic/quic_protocol.h"
+#include "net/quic/quic_session.h"
 
 namespace net {
 namespace test {
@@ -26,7 +27,7 @@ class CertVerifyResult;
 class NET_EXPORT_PRIVATE QuicConnectionLogger
     : public QuicConnectionDebugVisitor {
  public:
-  explicit QuicConnectionLogger(const BoundNetLog& net_log);
+  QuicConnectionLogger(QuicSession* session, const BoundNetLog& net_log);
 
   virtual ~QuicConnectionLogger();
 
@@ -119,6 +120,7 @@ class NET_EXPORT_PRIVATE QuicConnectionLogger
   void RecordLossHistograms() const;
 
   BoundNetLog net_log_;
+  QuicSession* session_;  // Unowned.
   // The last packet sequence number received.
   QuicPacketSequenceNumber last_received_packet_sequence_number_;
   // The size of the most recently received packet.