Remove usage of FOR_EACH_OBSERVER macro in components/

components/metrics/leak_detector/leak_detector.cc

 // Copyright 2016 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 "components/metrics/leak_detector/leak_detector.h"
 
 #include <stdint.h>
 
 #include <algorithm>
 
@@ skipping 329 matching lines @@
 
   if (!task_runner_->RunsTasksOnCurrentThread()) {
     task_runner_->PostTask(FROM_HERE,
                            base::Bind(&LeakDetector::NotifyObservers,
                                       base::Unretained(this), reports));
     return;
   }
 
   {
     base::AutoLock lock(observers_lock_);
-    FOR_EACH_OBSERVER(Observer, observers_, OnLeaksFound(reports));
+    for (Observer& observer : observers_)
+      observer.OnLeaksFound(reports);
   }
 }
 
 }  // namespace metrics