Replace FOR_EACH_OBSERVER in components/drive with range-based for

components/drive/chromeos/change_list_loader.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 "components/drive/chromeos/change_list_loader.h"
 
 #include <stddef.h>
 
 #include <set>
 #include <utility>
@@ skipping 438 matching lines @@
     // Start loading the change list.
     LoadChangeListFromServer(start_changestamp);
   }
 }
 
 void ChangeListLoader::OnChangeListLoadComplete(FileError error) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   if (!loaded_ && error == FILE_ERROR_OK) {
     loaded_ = true;
-    FOR_EACH_OBSERVER(ChangeListLoaderObserver,
-                      observers_,
-                      OnInitialLoadComplete());
+    for (auto& observer : observers_)
+      observer.OnInitialLoadComplete();
   }
 
   for (size_t i = 0; i < pending_load_callback_.size(); ++i) {
     base::ThreadTaskRunnerHandle::Get()->PostTask(
         FROM_HERE,
         base::Bind(pending_load_callback_[i], error));
   }
   pending_load_callback_.clear();
 
   // If there is pending update check, try to load the change from the server
@@ skipping 89 matching lines @@
     const base::Time& start_time,
     FileError error) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   const base::TimeDelta elapsed = base::Time::Now() - start_time;
   logger_->Log(logging::LOG_INFO,
                "Change lists applied (elapsed time: %sms)",
                base::Int64ToString(elapsed.InMilliseconds()).c_str());
 
   if (should_notify_changed_directories) {
-    FOR_EACH_OBSERVER(ChangeListLoaderObserver,
-                      observers_,
-                      OnFileChanged(change_list_processor->changed_files()));
+    for (auto& observer : observers_)
+      observer.OnFileChanged(change_list_processor->changed_files());
   }
 
   OnChangeListLoadComplete(error);
 
-  FOR_EACH_OBSERVER(ChangeListLoaderObserver,
-                    observers_,
-                    OnLoadFromServerComplete());
+  for (auto& observer : observers_)
+    observer.OnLoadFromServerComplete();
 }
 
 }  // namespace internal
 }  // namespace drive