Add a new histogram Net.QuicSession.HeadersStreamEarlyFramesReceived

net/quic/quic_connection_logger.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/quic/quic_connection_logger.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/bind.h"
@@ skipping 351 matching lines @@
   UMA_HISTOGRAM_COUNTS("Net.QuicSession.IncorrectConnectionIDsReceived",
                        num_incorrect_connection_ids_);
   UMA_HISTOGRAM_COUNTS("Net.QuicSession.UndecryptablePacketsReceived",
                        num_undecryptable_packets_);
   UMA_HISTOGRAM_COUNTS("Net.QuicSession.DuplicatePacketsReceived",
                        num_duplicate_packets_);
   UMA_HISTOGRAM_COUNTS("Net.QuicSession.BlockedFrames.Received",
                        num_blocked_frames_received_);
   UMA_HISTOGRAM_COUNTS("Net.QuicSession.BlockedFrames.Sent",
                        num_blocked_frames_sent_);
+  UMA_HISTOGRAM_COUNTS("Net.QuicSession.HeadersStreamEarlyFramesReceived",

[Alexei Svitkine (slow), 2015/02/18 19:53:55]

Optional nit: Maybe more readable if you add another . - i.e.:

Net.QuicSession.HeadersStreamEarly.FramesReceived

[Ryan Hamilton, 2015/02/18 19:57:35]

Done. Albeit as: Net.QuicSession.HeadersStream.EarlyFramesReceived

+                       session_->headers_stream()->num_early_frames_received());
 
   if (num_frames_received_ > 0) {
     int duplicate_stream_frame_per_thousand =
         num_duplicate_frames_received_ * 1000 / num_frames_received_;
     if (num_packets_received_ < 100) {
       UMA_HISTOGRAM_CUSTOM_COUNTS(
           "Net.QuicSession.StreamFrameDuplicatedShortConnection",
           duplicate_stream_frame_per_thousand, 1, 1000, 75);
     } else {
       UMA_HISTOGRAM_CUSTOM_COUNTS(
@@ skipping 522 matching lines @@
       continue;
     }
     // Record some overlapping patterns, to get a better picture, since this is
     // not very expensive.
     if (i % 3 == 0)
       six_packet_histogram->Add(recent_6_mask);
   }
 }
 
 }  // namespace net