Reduce FOR_EACH_OBSERVER usage in ui/

ui/snapshot/screenshot_grabber.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/snapshot/screenshot_grabber.h"
 
 #include <stddef.h>
 
 #include <climits>
 #include <string>
@@ skipping 169 matching lines @@
              base::TimeDelta::FromMilliseconds(kScreenshotMinimumIntervalInMS);
 }
 
 void ScreenshotGrabber::NotifyScreenshotCompleted(
     ScreenshotGrabberObserver::Result screenshot_result,
     const base::FilePath& screenshot_path) {
   DCHECK(base::MessageLoopForUI::IsCurrent());
 #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) {
   observers_.AddObserver(observer);
 }
 
 void ScreenshotGrabber::RemoveObserver(ScreenshotGrabberObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
@@ skipping 26 matching lines @@
 
   ShowNotificationCallback notification_callback(base::Bind(
       &ScreenshotGrabber::NotifyScreenshotCompleted, factory_.GetWeakPtr()));
   client_->PrepareFileAndRunOnBlockingPool(
       screenshot_path, blocking_task_runner_,
       base::Bind(&SaveScreenshot, base::ThreadTaskRunnerHandle::Get(),
                  notification_callback, screenshot_path, png_data));
 }
 
 }  // namespace ui