Remove FOR_EACH_OBSERVER macro usage in chrome/browser/sync_file_system

chrome/browser/sync_file_system/local/local_file_sync_service.cc

 // Copyright 2013 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/local/local_file_sync_service.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/single_thread_task_runner.h"
 #include "base/stl_util.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 311 matching lines @@
     SyncFileSystemBackend* backend =
         SyncFileSystemBackend::GetBackend(origin_to_contexts_[origin]);
     DCHECK(backend);
     DCHECK(backend->change_tracker());
     origin_change_map_.SetOriginChangeCount(
         origin, backend->change_tracker()->num_changes());
   }
   if (!need_notification)
     return;
   int64_t num_changes = origin_change_map_.GetTotalChangeCount();
-  FOR_EACH_OBSERVER(Observer, change_observers_,
-                    OnLocalChangeAvailable(num_changes));
+  for (auto& observer : change_observers_)
+    observer.OnLocalChangeAvailable(num_changes);
 }
 
 void LocalFileSyncService::SetOriginEnabled(const GURL& origin, bool enabled) {
   if (!base::ContainsKey(origin_to_contexts_, origin))
     return;
   origin_change_map_.SetOriginEnabled(origin, enabled);
 }
 
 LocalFileSyncService::LocalFileSyncService(Profile* profile,
                                            leveldb::Env* env_override)
@@ skipping 24 matching lines @@
       pending_origins_with_changes_.end()) {
     // We have remaining changes for the origin.
     pending_origins_with_changes_.erase(app_origin);
     SyncFileSystemBackend* backend =
         SyncFileSystemBackend::GetBackend(file_system_context);
     DCHECK(backend);
     DCHECK(backend->change_tracker());
     origin_change_map_.SetOriginChangeCount(
         app_origin, backend->change_tracker()->num_changes());
     int64_t num_changes = origin_change_map_.GetTotalChangeCount();
-    FOR_EACH_OBSERVER(Observer, change_observers_,
-                      OnLocalChangeAvailable(num_changes));
+    for (auto& observer : change_observers_)
+      observer.OnLocalChangeAvailable(num_changes);
   }
   callback.Run(status);
 }
 
 void LocalFileSyncService::DidInitializeForRemoteSync(
     const FileSystemURL& url,
     storage::FileSystemContext* file_system_context,
     const PrepareChangeCallback& callback,
     SyncStatusCode status) {
   if (status != SYNC_STATUS_OK) {
@@ skipping 99 matching lines @@
 
 LocalChangeProcessor* LocalFileSyncService::GetLocalChangeProcessor(
     const FileSystemURL& url) {
   if (!get_local_change_processor_.is_null())
     return get_local_change_processor_.Run(url.origin());
   DCHECK(local_change_processor_);
   return local_change_processor_;
 }
 
 }  // namespace sync_file_system