Remove FOR_EACH_OBSERVER macro usage in chrome/browser/sync_file_system

chrome/browser/sync_file_system/local/local_file_sync_status.cc

Index: chrome/browser/sync_file_system/local/local_file_sync_status.cc
diff --git a/chrome/browser/sync_file_system/local/local_file_sync_status.cc b/chrome/browser/sync_file_system/local/local_file_sync_status.cc
index b26831ae1c306b20760ea4d669c880a36732a992..c375ff797225c40207a5f5b30aba85edfb7a8af6 100644
--- a/chrome/browser/sync_file_system/local/local_file_sync_status.cc
+++ b/chrome/browser/sync_file_system/local/local_file_sync_status.cc
@@ -94,7 +94,8 @@ void LocalFileSyncStatus::EndWriting(const FileSystemURL& url) {
     writing_[origin_and_type].erase(normalized_path);
     if (writing_[origin_and_type].empty())
       writing_.erase(origin_and_type);
-    FOR_EACH_OBSERVER(Observer, observer_list_, OnSyncEnabled(url));
+    for (auto& observer : observer_list_)
+      observer.OnSyncEnabled(url);
   }
 }
 
@@ -113,8 +114,10 @@ void LocalFileSyncStatus::EndSyncing(const FileSystemURL& url) {
   syncing_[origin_and_type].erase(normalized_path);
   if (syncing_[origin_and_type].empty())
     syncing_.erase(origin_and_type);
-  FOR_EACH_OBSERVER(Observer, observer_list_, OnSyncEnabled(url));
-  FOR_EACH_OBSERVER(Observer, observer_list_, OnWriteEnabled(url));
+  for (auto& observer : observer_list_)
+    observer.OnSyncEnabled(url);
+  for (auto& observer : observer_list_)
+    observer.OnWriteEnabled(url);
 }
 
 bool LocalFileSyncStatus::IsWriting(const FileSystemURL& url) const {