Reduce FOR_EACH_OBSERVER usage in ui/

ui/snapshot/screenshot_grabber.cc

Index: ui/snapshot/screenshot_grabber.cc
diff --git a/ui/snapshot/screenshot_grabber.cc b/ui/snapshot/screenshot_grabber.cc
index ebccaaec342ee6d821c737c3ba8f6dba3412dbec..7b35748a699bc48e26f954197e07ba9ce8095eab 100644
--- a/ui/snapshot/screenshot_grabber.cc
+++ b/ui/snapshot/screenshot_grabber.cc
@@ -187,8 +187,8 @@ void ScreenshotGrabber::NotifyScreenshotCompleted(
 #if defined(USE_AURA)
   cursor_hider_.reset();
 #endif
-  FOR_EACH_OBSERVER(ScreenshotGrabberObserver, observers_,
-                    OnScreenshotCompleted(screenshot_result, screenshot_path));
+  for (ScreenshotGrabberObserver& observer : observers_)
+    observer.OnScreenshotCompleted(screenshot_result, screenshot_path);
 }
 
 void ScreenshotGrabber::AddObserver(ScreenshotGrabberObserver* observer) {