Replace FOR_EACH_OBSERVER in c/b/chromeos with range-based for

chrome/browser/chromeos/input_method/mock_candidate_window_controller.cc

Index: chrome/browser/chromeos/input_method/mock_candidate_window_controller.cc
diff --git a/chrome/browser/chromeos/input_method/mock_candidate_window_controller.cc b/chrome/browser/chromeos/input_method/mock_candidate_window_controller.cc
index de791c9c65e272f07735c1f266480352f2e78888..5c95b59916255572b0bbef69765a594d61a8196d 100644
--- a/chrome/browser/chromeos/input_method/mock_candidate_window_controller.cc
+++ b/chrome/browser/chromeos/input_method/mock_candidate_window_controller.cc
@@ -33,13 +33,13 @@ void MockCandidateWindowController::Hide() {
 }
 
 void MockCandidateWindowController::NotifyCandidateWindowOpened() {
-  FOR_EACH_OBSERVER(CandidateWindowController::Observer, observers_,
-                    CandidateWindowOpened());
+  for (auto& observer : observers_)
+    observer.CandidateWindowOpened();
 }
 
 void MockCandidateWindowController::NotifyCandidateWindowClosed() {
-  FOR_EACH_OBSERVER(CandidateWindowController::Observer, observers_,
-                    CandidateWindowClosed());
+  for (auto& observer : observers_)
+    observer.CandidateWindowClosed();
 }
 
 }  // namespace input_method