Supporting command line argument to force field trials

chrome/browser/autocomplete/autocomplete_field_trial.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 "chrome/browser/autocomplete/autocomplete_field_trial.h"
 
 #include <string>
 
 #include "base/metrics/field_trial.h"
 
@@ skipping 38 matching lines @@
   // get ingrained, users tend to learn that a particular suggestion is
   // at a particular spot in the drop-down--we're going to make these
   // field trials sticky.  We want users to stay in them once assigned
   // so they have a better experience and also so we don't get weird
   // effects as omnibox ranking keeps changing and users learn they can't
   // trust the omnibox.  Hence, to create the field trials we require
   // that field trials can be made sticky.
   if (base::FieldTrialList::IsOneTimeRandomizationEnabled()) {  // sticky trials
     // Create aggressive History URL Provider field trial.
     // Make it expire on August 1, 2012.
-    scoped_refptr<base::FieldTrial> trial(new base::FieldTrial(
+    scoped_refptr<base::FieldTrial> trial(base::FieldTrial::CreateInstance(
         kAggressiveHUPFieldTrialName, kAggressiveHUPFieldTrialDivisor,
         "Standard", 2012, 8, 1));
     trial->UseOneTimeRandomization();
     aggressive_hup_experiment_group = trial->AppendGroup("Aggressive",
         kAggressiveHUPFieldTrialExperimentFraction);
 
     // Create inline History Quick Provider field trial.
     // Make it expire on November 8, 2012.
-    trial = new base::FieldTrial(
+    trial = base::FieldTrial::CreateInstance(
         kDisallowInlineHQPFieldTrialName, kDisallowInlineHQPFieldTrialDivisor,
         "Standard", 2012, 11, 8);
     trial->UseOneTimeRandomization();
     disallow_inline_hqp_experiment_group = trial->AppendGroup("DisallowInline",
         kDisallowInlineHQPFieldTrialExperimentFraction);
   }
 }
 
 bool AutocompleteFieldTrial::InAggressiveHUPFieldTrial() {
   return base::FieldTrialList::TrialExists(kAggressiveHUPFieldTrialName);
@@ skipping 15 matching lines @@
 
 bool AutocompleteFieldTrial::InDisallowInlineHQPFieldTrialExperimentGroup() {
   if (!base::FieldTrialList::TrialExists(kDisallowInlineHQPFieldTrialName))
     return false;
 
   // Return true if we're in the experiment group.
   const int group = base::FieldTrialList::FindValue(
       kDisallowInlineHQPFieldTrialName);
   return group == disallow_inline_hqp_experiment_group;
 }