Add one-time randomization support for FieldTrial, and the ability to

net/socket/ssl_client_socket_pool.cc

 // Copyright (c) 2011 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/socket/ssl_client_socket_pool.h"
 
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
 #include "base/values.h"
 #include "net/base/net_errors.h"
@@ skipping 330 matching lines @@
                        (host.size() > 11 &&
                         host.rfind(".google.com") == host.size() - 11);
       if (is_google) {
         UMA_HISTOGRAM_CUSTOM_TIMES("Net.SSL_Connection_Latency_Google",
                                    connect_duration,
                                    base::TimeDelta::FromMilliseconds(1),
                                    base::TimeDelta::FromMinutes(10),
                                    100);
       }
 
-      static bool false_start_trial(
-          base::FieldTrialList::Find("SSLFalseStart") &&
-          !base::FieldTrialList::Find("SSLFalseStart")->group_name().empty());
+      static const bool false_start_trial =
+          base::FieldTrialList::TrialExists("SSLFalseStart");
       if (false_start_trial) {
         UMA_HISTOGRAM_CUSTOM_TIMES(base::FieldTrial::MakeName(
                                        "Net.SSL_Connection_Latency",
                                        "SSLFalseStart"),
                                    connect_duration,
                                    base::TimeDelta::FromMilliseconds(1),
                                    base::TimeDelta::FromMinutes(10),
                                    100);
       }
     }
@@ skipping 210 matching lines @@
 
 ClientSocketPoolHistograms* SSLClientSocketPool::histograms() const {
   return base_.histograms();
 }
 
 void SSLClientSocketPool::OnSSLConfigChanged() {
   Flush();
 }
 
 }  // namespace net