Reduce usage of FOR_EACH_OBSERVER macro in chrome/browser/signin

chrome/browser/signin/easy_unlock_service.cc

Index: chrome/browser/signin/easy_unlock_service.cc
diff --git a/chrome/browser/signin/easy_unlock_service.cc b/chrome/browser/signin/easy_unlock_service.cc
index 7a21e93e623e77b88488d149e3fff845ccf71579..63708295c2287c1d2a2610117cb2617a69b0a622 100644
--- a/chrome/browser/signin/easy_unlock_service.cc
+++ b/chrome/browser/signin/easy_unlock_service.cc
@@ -494,8 +494,8 @@ bool EasyUnlockService::UpdateScreenlockState(ScreenlockState state) {
       HandleAuthFailure(GetAccountId());
   }
 
-  FOR_EACH_OBSERVER(
-      EasyUnlockServiceObserver, observers_, OnScreenlockStateChanged(state));
+  for (EasyUnlockServiceObserver& observer : observers_)
+    observer.OnScreenlockStateChanged(state);
   return true;
 }
 
@@ -723,8 +723,8 @@ void EasyUnlockService::NotifyUserUpdated() {
 }
 
 void EasyUnlockService::NotifyTurnOffOperationStatusChanged() {
-  FOR_EACH_OBSERVER(
-      EasyUnlockServiceObserver, observers_, OnTurnOffOperationStatusChanged());
+  for (EasyUnlockServiceObserver& observer : observers_)
+    observer.OnTurnOffOperationStatusChanged();
 }
 
 void EasyUnlockService::ResetScreenlockState() {