Create A/B test of SDCH...

chrome/browser/net/dns_global.cc

 // Copyright (c) 2006-2008 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 "chrome/browser/net/dns_global.h"
 
 #include <map>
 #include <string>
 
 #include "base/singleton.h"
@@ skipping 563 matching lines @@
 
   trial_ = new FieldTrial("DnsImpact", kDivisor);
 
   // First option is to disable prefetching completely.
   int disabled_prefetch = trial_->AppendGroup("_disabled_prefetch",
                                               kProbabilityPerGroup);
   // Set parallel prefetch limit to 4 instead of default 8.
   int parallel_4_prefetch = trial_->AppendGroup("_parallel_4_prefetch",
                                                 kProbabilityPerGroup);
   // Set congestion detection at 500ms, rather than the 1 second default.
-  int max_500ms_prefetch = trial_->AppendGroup("_max_500ms_prefetch_queue",
+  int max_500ms_prefetch = trial_->AppendGroup("_max_500ms_queue_prefetch",
                                                kProbabilityPerGroup);
   // Set congestion detection at 2 seconds instead of the 1 second default.
-  int max_2s_prefetch = trial_->AppendGroup("_max_2s_prefetch_queue",
+  int max_2s_prefetch = trial_->AppendGroup("_max_2s_queue_prefetch",
                                             kProbabilityPerGroup);
 
+  trial_->AppendGroup("_default_enabled_prefetch",
+      FieldTrial::kAllRemainingProbability);
+
   if (trial_->group() != disabled_prefetch) {
     // Initialize the DNS prefetch system.
 
     size_t max_concurrent = kMaxConcurrentLookups;
 
     int max_queueing_delay_ms = kMaxQueueingDelayMs;
 
     if (trial_->group() == parallel_4_prefetch)
       max_concurrent = 4;
     else if (trial_->group() == max_500ms_prefetch)
@@ skipping 12 matching lines @@
   }
 }
 
 DnsPrefetcherInit::~DnsPrefetcherInit() {
     if (dns_master)
       FreeDnsPrefetchResources();
   }
 
 }  // namespace chrome_browser_net