Reduce FOR_EACH_OBSERVER usage in ui/

ui/display/display_change_notifier.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/display/display_change_notifier.h"
 
 #include <stdint.h>
 
 #include "ui/display/display.h"
 #include "ui/display/display_observer.h"
@@ skipping 30 matching lines @@
 }
 
 void DisplayChangeNotifier::NotifyDisplaysChanged(
     const std::vector<Display>& old_displays,
     const std::vector<Display>& new_displays) {
   // Display present in old_displays but not in new_displays has been removed.
   std::vector<Display>::const_iterator old_it = old_displays.begin();
   for (; old_it != old_displays.end(); ++old_it) {
     if (std::find_if(new_displays.begin(), new_displays.end(),
                      DisplayComparator(*old_it)) == new_displays.end()) {
-      FOR_EACH_OBSERVER(DisplayObserver, observer_list_,
-                        OnDisplayRemoved(*old_it));
+      for (DisplayObserver& observer : observer_list_)
+        observer.OnDisplayRemoved(*old_it);
     }
   }
 
   // Display present in new_displays but not in old_displays has been added.
   // Display present in both might have been modified.
   for (std::vector<Display>::const_iterator new_it = new_displays.begin();
        new_it != new_displays.end(); ++new_it) {
     std::vector<Display>::const_iterator old_it = std::find_if(
         old_displays.begin(), old_displays.end(), DisplayComparator(*new_it));
 
     if (old_it == old_displays.end()) {
-      FOR_EACH_OBSERVER(DisplayObserver, observer_list_,
-                        OnDisplayAdded(*new_it));
+      for (DisplayObserver& observer : observer_list_)
+        observer.OnDisplayAdded(*new_it);
       continue;
     }
 
     uint32_t metrics = DisplayObserver::DISPLAY_METRIC_NONE;
 
     if (new_it->bounds() != old_it->bounds())
       metrics |= DisplayObserver::DISPLAY_METRIC_BOUNDS;
 
     if (new_it->rotation() != old_it->rotation())
       metrics |= DisplayObserver::DISPLAY_METRIC_ROTATION;
 
     if (new_it->work_area() != old_it->work_area())
       metrics |= DisplayObserver::DISPLAY_METRIC_WORK_AREA;
 
     if (new_it->device_scale_factor() != old_it->device_scale_factor())
       metrics |= DisplayObserver::DISPLAY_METRIC_DEVICE_SCALE_FACTOR;
 
     if (metrics != DisplayObserver::DISPLAY_METRIC_NONE) {
-      FOR_EACH_OBSERVER(DisplayObserver, observer_list_,
-                        OnDisplayMetricsChanged(*new_it, metrics));
+      for (DisplayObserver& observer : observer_list_)
+        observer.OnDisplayMetricsChanged(*new_it, metrics);
     }
   }
 }
 
 }  // namespace display