QUIC - Added a histogram to count the number of current active sessions

net/quic/quic_stream_factory.cc

 // Copyright (c) 2012 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_stream_factory.h"
 
 #include <set>
 
 #include "base/cpu.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 764 matching lines @@
 }
 
 bool QuicStreamFactory::HasActiveJob(const QuicServerId& key) const {
   return ContainsKey(active_jobs_, key);
 }
 
 void QuicStreamFactory::ActivateSession(
     const QuicServerId& server_id,
     QuicClientSession* session) {
   DCHECK(!HasActiveSession(server_id));
+  UMA_HISTOGRAM_COUNTS("Net.QuicActiveSessions", active_sessions_.size());
   active_sessions_[server_id] = session;
   session_aliases_[session].insert(server_id);
   const IpAliasKey ip_alias_key(session->connection()->peer_address(),
                                 server_id.is_https());
   DCHECK(!ContainsKey(ip_aliases_[ip_alias_key], session));
   ip_aliases_[ip_alias_key].insert(session);
 }
 
 void QuicStreamFactory::InitializeCachedStateInCryptoConfig(
     const QuicServerId& server_id,
@@ skipping 45 matching lines @@
     // differently so that we still race TCP but we don't consider the
     // session connected until the handshake has been confirmed.
     HistogramBrokenAlternateProtocolLocation(
         BROKEN_ALTERNATE_PROTOCOL_LOCATION_QUIC_STREAM_FACTORY);
     http_server_properties_->SetBrokenAlternateProtocol(
         server_id.host_port_pair());
   }
 }
 
 }  // namespace net