Reduce FOR_EACH_OBSERVER usage in ui/

ui/chromeos/ime/candidate_window_view.cc

Index: ui/chromeos/ime/candidate_window_view.cc
diff --git a/ui/chromeos/ime/candidate_window_view.cc b/ui/chromeos/ime/candidate_window_view.cc
index 5c42421172df3216dd4353de09c871f24b229208..8cbdf44a6028541da086d8a65db97d02059e2b4e 100644
--- a/ui/chromeos/ime/candidate_window_view.cc
+++ b/ui/chromeos/ime/candidate_window_view.cc
@@ -409,7 +409,8 @@ void CandidateWindowView::ButtonPressed(views::Button* sender,
                                         const ui::Event& event) {
   for (size_t i = 0; i < candidate_views_.size(); ++i) {
     if (sender == candidate_views_[i]) {
-      FOR_EACH_OBSERVER(Observer, observers_, OnCandidateCommitted(i));
+      for (auto& observer : observers_)
+        observer.OnCandidateCommitted(i);
       return;
     }
   }