Remove usage of FOR_EACH_OBSERVER macro in components/

components/metrics/metrics_service.cc

 // Copyright 2014 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.
 
 //------------------------------------------------------------------------------
 // Description of the life cycle of a instance of MetricsService.
 //
 //  OVERVIEW
 //
 // A MetricsService instance is typically created at application startup.  It is
@@ skipping 1129 matching lines @@
   DCHECK_EQ(INITIALIZED, state_);
   metrics_providers_.push_back(std::move(provider));
 }
 
 void MetricsService::CheckForClonedInstall(
     scoped_refptr<base::SingleThreadTaskRunner> task_runner) {
   state_manager_->CheckForClonedInstall(task_runner);
 }
 
 void MetricsService::NotifySyntheticTrialObservers() {
-  FOR_EACH_OBSERVER(variations::SyntheticTrialObserver,
-                    synthetic_trial_observer_list_,
-                    OnSyntheticTrialsChanged(synthetic_trial_groups_));
+  for (variations::SyntheticTrialObserver& observer :
+       synthetic_trial_observer_list_) {
+    observer.OnSyntheticTrialsChanged(synthetic_trial_groups_);
+  }
 }
 
 void MetricsService::GetSyntheticFieldTrialsOlderThan(
     base::TimeTicks time,
     std::vector<variations::ActiveGroupId>* synthetic_trials) {
   DCHECK(synthetic_trials);
   synthetic_trials->clear();
   for (size_t i = 0; i < synthetic_trial_groups_.size(); ++i) {
     if (synthetic_trial_groups_[i].start_time <= time)
       synthetic_trials->push_back(synthetic_trial_groups_[i].id);
@@ skipping 59 matching lines @@
                  base::Time::Now().ToTimeT());
 }
 
 void MetricsService::SkipAndDiscardUpload() {
   log_manager_.DiscardStagedLog();
   scheduler_->UploadCancelled();
   log_upload_in_progress_ = false;
 }
 
 }  // namespace metrics