Reduce usage of FOR_EACH_OBSERVER macro in chrome/browser

chrome/browser/safe_browsing/ui_manager.cc

Index: chrome/browser/safe_browsing/ui_manager.cc
diff --git a/chrome/browser/safe_browsing/ui_manager.cc b/chrome/browser/safe_browsing/ui_manager.cc
index a68ee631d3762bd653bcc9199972c1ead70e125b..aa67cef73c9870300176c2a3bc191909b7a68d5b 100644
--- a/chrome/browser/safe_browsing/ui_manager.cc
+++ b/chrome/browser/safe_browsing/ui_manager.cc
@@ -250,7 +250,8 @@ void SafeBrowsingUIManager::DisplayBlockingPage(
   }
 
   if (resource.threat_type != SB_THREAT_TYPE_SAFE) {
-    FOR_EACH_OBSERVER(Observer, observer_list_, OnSafeBrowsingHit(resource));
+    for (Observer& observer : observer_list_)
+      observer.OnSafeBrowsingHit(resource);
   }
   AddToWhitelistUrlSet(resource, true /* A decision is now pending */);
   SafeBrowsingBlockingPage::ShowBlockingPage(this, resource);