Reduce usage of FOR_EACH_OBSERVER macro in chrome/browser

chrome/browser/permissions/permission_request_manager.cc

Index: chrome/browser/permissions/permission_request_manager.cc
diff --git a/chrome/browser/permissions/permission_request_manager.cc b/chrome/browser/permissions/permission_request_manager.cc
index 40fdb5031c0ea5d498ea63f9a43a18bbf4cc2ba6..3d58a72046e9f185c6e3d53e482e44e7f06b11b7 100644
--- a/chrome/browser/permissions/permission_request_manager.cc
+++ b/chrome/browser/permissions/permission_request_manager.cc
@@ -503,7 +503,8 @@ void PermissionRequestManager::RemoveObserver(Observer* observer) {
 }
 
 void PermissionRequestManager::NotifyBubbleAdded() {
-  FOR_EACH_OBSERVER(Observer, observer_list_, OnBubbleAdded());
+  for (Observer& observer : observer_list_)
+    observer.OnBubbleAdded();
 }
 
 void PermissionRequestManager::DoAutoResponseForTesting() {