Decrements FieldTrialList::constructor_count_ in the destructor. I'm...

base/field_trial.h

 // 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.
 
 // FieldTrial is a class for handling details of statistical experiments
 // performed by actual users in the field (i.e., in a shipped or beta product).
 // All code is called exclusively on the UI thread currently.
 //
 // The simplest example is a test to see whether one of two options produces
 // "better" results across our user population.  In that scenario, UMA data
@@ skipping 62 matching lines @@
   static base::Time application_start_time() {
     if (global_)
       return global_->application_start_time_;
     // For testing purposes only, or when we don't yet have a start time.
     return base::Time::Now();
   }
 
  private:
   typedef std::map<std::wstring, FieldTrial*> RegistrationList;
 
-  friend class FieldTrialTest;
-  static void ResetConstructorCountForTestingOnly() { constructor_count_ = 0; }
-
   static FieldTrialList* global_;  // The singleton of this class.
-  static int constructor_count_;   // Prevent having more than one.
 
   base::Time application_start_time_;
   RegistrationList registered_;
 
   DISALLOW_COPY_AND_ASSIGN(FieldTrialList);
 };
 
 #endif  // BASE_FIELD_TRIAL_H_