Remove usage of FOR_EACH_OBSERVER macro in mojo

mojo/edk/js/handle.cc

Index: mojo/edk/js/handle.cc
diff --git a/mojo/edk/js/handle.cc b/mojo/edk/js/handle.cc
index 9f9f1619cc7a6b0672600293aeda5e57bdede753..7da8e9fa1966ad2e8fc735c29d651f40a6a521c6 100644
--- a/mojo/edk/js/handle.cc
+++ b/mojo/edk/js/handle.cc
@@ -37,7 +37,8 @@ void HandleWrapper::NotifyCloseObservers() {
   if (!handle_.is_valid())
     return;
 
-  FOR_EACH_OBSERVER(HandleCloseObserver, close_observers_, OnWillCloseHandle());
+  for (auto& observer : close_observers_)
+    observer.OnWillCloseHandle();
 }
 
 }  // namespace js