Add and implement API to associate Google experiment IDs with FieldTrials.

chrome/browser/metrics/field_trial_synchronizer.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/metrics/field_trial_synchronizer.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/threading/thread.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/metrics/experiments_helper.h"
 #include "chrome/common/render_messages.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_process_host.h"
 
 using content::BrowserThread;
 
 FieldTrialSynchronizer::FieldTrialSynchronizer() {
   DCHECK(field_trial_synchronizer_ == NULL);
   field_trial_synchronizer_ = this;
   base::FieldTrialList::AddObserver(this);
 
-  ExperimentsHelper::SetChildProcessLoggingExperimentList();
+  experiments_helper::SetChildProcessLoggingExperimentList();
 }
 
 FieldTrialSynchronizer::~FieldTrialSynchronizer() {
   base::FieldTrialList::RemoveObserver(this);
   field_trial_synchronizer_ = NULL;
 }
 
 void FieldTrialSynchronizer::NotifyAllRenderers(
     const std::string& field_trial_name,
     const std::string& group_name) {
@@ skipping 11 matching lines @@
 
 void FieldTrialSynchronizer::OnFieldTrialGroupFinalized(
     const std::string& field_trial_name,
     const std::string& group_name) {
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE,
       base::Bind(&FieldTrialSynchronizer::NotifyAllRenderers,
                  this,
                  field_trial_name,
                  group_name));
-  ExperimentsHelper::SetChildProcessLoggingExperimentList();
+  experiments_helper::SetChildProcessLoggingExperimentList();
 }
 
 // static
 FieldTrialSynchronizer*
     FieldTrialSynchronizer::field_trial_synchronizer_ = NULL;