SPDY - A histogram to track spdy versions negotiated by chrome.

net/spdy/spdy_session.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/spdy/spdy_session.h"
 
 #include <map>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
@@ skipping 386 matching lines @@
   }
 
   DCHECK(protocol >= kProtoSPDY2);
   DCHECK(protocol <= kProtoSPDY3);
   int version = (protocol == kProtoSPDY3) ? 3 : 2;
   flow_control_ = (protocol >= kProtoSPDY3);
 
   buffered_spdy_framer_.reset(new BufferedSpdyFramer(version));
   buffered_spdy_framer_->set_visitor(this);
   SendInitialSettings();
+  UMA_HISTOGRAM_ENUMERATION("Net.SpdyVersion", protocol, kProtoMaximumVersion);
 
   // Write out any data that we might have to send, such as the settings frame.
   WriteSocketLater();
   net::Error error = ReadSocket();
   if (error == ERR_IO_PENDING)
     return OK;
   return error;
 }
 
 bool SpdySession::VerifyDomainAuthentication(const std::string& domain) {
@@ skipping 1573 matching lines @@
 SSLClientSocket* SpdySession::GetSSLClientSocket() const {
   if (!is_secure_)
     return NULL;
   SSLClientSocket* ssl_socket =
       reinterpret_cast<SSLClientSocket*>(connection_->socket());
   DCHECK(ssl_socket);
   return ssl_socket;
 }
 
 }  // namespace net