Reduce usage of FOR_EACH_OBSERVER macro in chrome/browser/signin

chrome/browser/status_icons/status_icon.cc

Index: chrome/browser/status_icons/status_icon.cc
diff --git a/chrome/browser/status_icons/status_icon.cc b/chrome/browser/status_icons/status_icon.cc
index a05a88e6a7b155c323927cd1947d032cdeb359b9..ecfc2c9c0b57c2ad08eb3e96279d0cc300238d40 100644
--- a/chrome/browser/status_icons/status_icon.cc
+++ b/chrome/browser/status_icons/status_icon.cc
@@ -28,12 +28,14 @@ bool StatusIcon::HasObservers() const {
 }
 
 void StatusIcon::DispatchClickEvent() {
-  FOR_EACH_OBSERVER(StatusIconObserver, observers_, OnStatusIconClicked());
+  for (StatusIconObserver& observer : observers_)
+    observer.OnStatusIconClicked();
 }
 
 #if defined(OS_WIN)
 void StatusIcon::DispatchBalloonClickEvent() {
-  FOR_EACH_OBSERVER(StatusIconObserver, observers_, OnBalloonClicked());
+  for (StatusIconObserver& observer : observers_)
+    observer.OnBalloonClicked();
 }
 #endif