Remove FOR_EACH_OBSERVER macro usage in chrome/browser/sync_file_system

chrome/browser/sync_file_system/task_logger.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.
 
 #include "chrome/browser/sync_file_system/task_logger.h"
 
 #include <stddef.h>
 
 #include "base/lazy_instance.h"
 #include "base/synchronization/lock.h"
@@ skipping 28 matching lines @@
 void TaskLogger::RecordLog(std::unique_ptr<TaskLog> log) {
   if (!log)
     return;
 
   if (log_history_.size() >= kMaxLogSize) {
     log_history_.pop_front();
   }
 
   log_history_.push_back(std::move(log));
 
-  FOR_EACH_OBSERVER(Observer, observers_,
-                    OnLogRecorded(*log_history_.back()));
+  for (auto& observer : observers_)
+    observer.OnLogRecorded(*log_history_.back());
 }
 
 void TaskLogger::ClearLog() {
   log_history_.clear();
 }
 
 void TaskLogger::AddObserver(Observer* observer) {
   observers_.AddObserver(observer);
 }
 
 void TaskLogger::RemoveObserver(Observer* observer) {
   observers_.RemoveObserver(observer);
 }
 
 const TaskLogger::LogList& TaskLogger::GetLog() const {
   return log_history_;
 }
 
 }  // namespace sync_file_system